45.0g of Silver (0.23 J/goc) was mixed in a beaker with 18.0g of water (4.18 J/g°C) with an initial temperature of 22.0°C. The final temperature was found to be 51.0°C. What was the change in temperature of the silver?

Answers

Answer 1
Answer: 210.8 °C

Explanation:

Data:

Silver:

      m = 45.0g
      C = 0.23 J / (g°C)
      ΔT = ?

Water:

      m = 18.0g
      C = 4.18 J/(g°C=
      Ti = 22.0°C

Equilibrium

      Tf = 51.0°C

Solution:

1) At the end the system reaches the thermal equilibrium. That means that at the end all the system is at same temperature.

The problem states the the the final temperature is 51°C. That means that the sylver, the water and the beaker will be at  51°C

2) The heat released by the silver is the product of its mass, its heat capaciy and the change in temperature:

=> Heat released by silver = m * C * ΔT = 45.0g * 0.23 J / (g °C) * ΔT

3) The heat absorbed by the water is the product of its mass, its heat capacity and the change in temperature:

=> Heat absorbed by water = m * C * ΔT = 18.0g * 4.18 J/ (g°C) * [51.0 - 22.0]°C

4) By the law of convervation of enery (first law of thermodynamics), assumin no losses of heat, the heat released by silver equals the heat absorbed by the water:

=> 45.0g * 0.23 J / (g °C) * ΔT = 18.0g * 4.18 J/ (g°C) * [51.0 - 22.0]°C

From which you can solve for ΔT:

5) ΔT = 18.0g * 4.18J/(g°C) * (29°C) / (45.0g * 0.23J/g°C) = 210.8°

That is the answer, the change in temperature of silve was 210.8°C

Related Questions

C3h8 + 5 o2 --> 3 co2 + 4 h2o this is an example of a _______________.

Answers

Answer:
combustion reaction

Explanation:
In chemistry, a combustion reaction is defined as a reaction between an oxidant and any compound that leads to the production of another compound along with a huge amount of heat.

Now, let's check the reaction given:
C₃H₈ + 5 O₂ --> 3 CO₂ + 4 H₂O
The oxidant is oxygen gas
The compound reacting is propane
The compound produced is carbon dioxide along with water vapor and heat

Therefore, the given reaction is a combustion reaction

Hope this helps :)

Answer: [tex]C_{3}H_{8} + 5O_{2} \rightarrow 3CO_{2} + 4H_{2}O[/tex] this is an example of a combustion reaction.

Explanation:

A reaction in which a compound reacts with oxygen and results in the formation of carbon dioxide and water is known as combustion reaction.

For example, [tex]C_{3}H_{8} + 5O_{2} \rightarrow 3CO_{2} + 4H_{2}O[/tex] is a combustion reaction.

Also, it is known that combustion reactions are exothermic in nature because heat is released during these reactions.

If you have exactly 2.00 moles each, of two different substances, then which of the following must be true about the two samples? They have the same mass. They have the same weight. They have the same number of particles. Both b and c.

Answers

1 mole of any substance contains 6.022 x 10²³ molecules. however the masses of moles may vary between elements. The molar masses of different elements vary. e.g.; Na molar mass is 23 g/mol whereas Mg molar mass is 24 g/mol.
1 mol of Na weights 23 g whereas 1 mol of Mg weighs 24g.
If 2 substances have same number of moles, their masses may vary depending on the molar masses of the elements but the number of particles of both substances are the same.
correct answer is they have the same number of particles

If you have 2.00 moles each of two different substances, then they have the same number of particles.

What are moles?

In the International System of Units, Mole is the base unit of the amount of any substance.

If two compounds have the same number of moles, their masses may differ based on the molar masses of the elements.

Both substances have the same number of particles.

Thus, the correct option is B, They have the same number of particles.

Learn more moles, here:

https://brainly.com/question/15209553

Covalent bonds form between hydrogen and oxygen atoms in a water molecule as a result of:

Answers

Covalent bonds form between hydrogen and oxygen atoms in a water molecule as a result of - Sharing of electrons between atoms.

What volume of a 2.5 M NaOH solution is required to make 1 liter of a 0.75 M NaOH?

0.3 liter
1 liter
33 liters
3.3 liters

Answers

C1V1 =C2V2... general formula...where C is the concentration and V the volume.....
(2.5) (V1) = (0.75)(1)..
V1 = 0.3L
Final answer:

0.3 liter of the 2.5 M NaOH solution is required to make 1 liter of a 0.75 M NaOH solution.

Explanation:

To find the volume of a NaOH solution needed, we can use the formula:

(M1)(V1) = (M2)(V2)

Where:

M1 is the initial concentration of NaOH (2.5 M)V1 is the initial volume of NaOH (unknown)M2 is the final concentration of NaOH (0.75 M)V2 is the final volume of NaOH (1 L)

Plugging in the given values:

(2.5 M)(V1) = (0.75 M)(1 L)

Solving for V1:

V1 = (0.75 M)(1 L) ÷ (2.5 M) = 0.3 L

Therefore, 0.3 liter of the 2.5 M NaOH solution is required to make 1 liter of a 0.75 M NaOH solution.

Learn more about Volume calculation here:

https://brainly.com/question/32822827

#SPJ13

turn the word equation into a chemical balanced equation.

Potassium chlorate breaks down into potassium chloride and oxygen gas

Answers

(2)KClO3 = (2)KCl + (3)O2

you have 2 Potassium Chlorates for every 2 Potassium Chlorides and 3 Oxygen

What characteristic property did arrhenius attribute to acids and bases?

Answers

An Arrhenius acid is a substance that dissociates in water to form hydrogen ions or protons (H⁺).
For example hydrochloric acid: HCl(aq) → H⁺(aq) + Cl⁻(aq).
An Arrhenius base is a substance that dissociates in water to form hydroxide ions (OH⁻). 
For example sodium hydroxide: NaOH(aq) → Na⁺(aq) + OH⁻(aq).

_______ is the change of state of a substance from solid to vapor without passing through the liquid state.

Answers

sublimation is the change of state of a substance from solid to vapor without passing thru the liquid state.

The oxidation number of hydrogen in sodium hydride (NaH)

Answers

The oxidation number should be -1

In sodium hydride (NaH), the oxidation number of hydrogen is -1, which is an exception to its usual +1 state, as it forms an ionic bond with sodium.

The oxidation number of hydrogen is typically +1, but in compounds known as metal hydrides, such as sodium hydride (NaH), the oxidation number for hydrogen is -1. This is due to hydrogen forming an ionic bond with the metal sodium, resulting in the hydride ion (H-). Since NaH is an ionic compound, we assign sodium (Na) an oxidation number of +1, which is characteristic for metals in Group IA. Consequently, to balance the charge, hydrogen must have an oxidation number of -1 in NaH, making it an exception to the typical +1 oxidation state of hydrogen when covalently bonded to nonmetals.

in the reaction mg(s)+2hcl(aq)→mgcl2(aq)+h2(g) + MgCl2 (aq) how many grams of hydrogen gas will be produced from 125.0 milliliters of a 6.0 M HCI in an excess of Mg

Answers

The reaction 
Mg(s) + 2HCl(aq) = MgCl2(aq) + H2(g) +MgCl2 
Moles of HCl used will be;
 = 0.125 l × 6.0 M
 = 0.75 moles 
The mole ratio of HCl to H2 is 2:1
Therefore; moles of Hydrogen is 0.75/2 = 0.375 mole
Molecular mass of hydrogen is 2 g
Hence; the mass of hydrogen = 2 × 0.375 = 0.75 g
Answer:

0.756g

Explanation:


I am assuming that 6.0MHCl is a typo, and that it should be 6.0molL−1HCl , since that makes sense in the equation.


First we have to find the amount of HCl in the solution. We use the formula n=cV where n is the amount of substance in moles, c is the concentration of the solution in moles per liter, and V is the volume of the substance in liters.


n(HCl)=6.0molL−1×0.125L=0.75mol


Then we find out how many moles of hydrogen gas (H2 ) are produced. In the formula we see 2HCl , and H2 . This means there is 1 mole of H2 for every 2 moles of HCl so to find the amount of H2 we use:


n(H2)=12×0.75mol=0.375mol


Now we find the molar mass of the H2 molecules, by adding together the atomic weights of the constituent molecules. In this case: 1.008+1.008=2.016 . Then we use the formula m=nM where m is the mass of the substance in grams, and M is the molar mass of the substance in grams per mole.


m(H2)=0.375mol×2.016gmol−1=0.756g

A sample of a compound of mercury and bromine with a mass of 0.389 g was found to contain 0.111 g bromine. its molecular mass was found to be 561. what are its empirical and molecular formulas?

Answers

Hello!

1) To get the empirical formula, we'll need to do the following:

First, we'll need to determine the mass of mercury (Hg) using the following equation:

[tex]mHg=mTotal-mBr=0,389 g - 0,111 g = 0.278 g Hg[/tex]

Now, we calculate the moles of each atom, using atomic masses:

[tex]molesHg=0,278gHg* \frac{1 mol Hg}{200,592gHg}= 0,001386 molHg \\ \\ molesBr=0,111gBr* \frac{1 mol Br}{79,904gBr}= 0,001389 molBr[/tex]

To finish, we express the formula using the moles, and dividing each amount by the lower one (0,001386 mol):

[tex]Hg _{ \frac{0,001386}{0,001386} } Br_{\frac{0,001389}{0,001386}} =Hg_1Br_1=HgBr[/tex]

2) To calculate the molecular formula, well need to do the following:

First, we calculate the molecular mass of the empirical formula:

[tex]MMHgBr= AM Hg + AM Br= 200,592 g/mol + 79,904 g/mol \\ \\ =280 gHgBr/mol[/tex]

Now, we divide the molecular mass of the compound between the molecular mass of the empirical formula to know how many empirical formulas are in the molecular formula:

[tex]\frac{561g/mol}{280g/mol}=2 [/tex]

To finish, we multiply the coefficients in the empirical formula by the number we just calculated to get the molecular formula:

[tex]Hg_{1*2} Br_{1*2}=Hg_2Br_2 [/tex]

Have a nice day!

The empirical formula of the given compound is [tex]\boxed{{\text{HgBr}}}[/tex].

The molecular formula of the given compound is [tex]\boxed{{\text{H}}{{\text{g}}_2}{\text{B}}{{\text{r}}_2}}[/tex] .

Further explanation:

Empirical formula:

It is atom’s simplest positive integer ratio in compound. It may or may not be same as that of molecular formula. For example, the empirical formula of sulfur dioxide is [tex]{\text{SO}}[/tex] .

Molecular formula:

It is chemical formula that indicates total number and kinds of atoms in molecule. For example, molecular formula of sulfur dioxide is [tex]{\text{S}}{{\text{O}}_2}[/tex] .

Step 1: Mass of mercury (Hg) is to be calculated. This is done by using equation (1).

Since the given compound consists of only mercury and bromine. So the mass of mercury is calculated as follows:

[tex]{\text{Mass of mercury}}\left({{\text{Hg}}}\right)={\text{Mass of compound}} - {\text{Mass of bromine}}\left({{\text{Br}}}\right)[/tex]

…… (1)

The mass of the compound is 0.389 g.

The mass of bromine is 0.111 g.

Substitute the values in equation (1).

[tex]\begin{aligned}{\text{Mass of mercury}}&={\text{0}}{\text{.389 g}} - {\text{0}}{\text{.111 g}}\\&={\text{0}}{\text{.278 g}}\\\end{aligned}[/tex]

Step 2: The moles of mercury and bromine are to be calculated.

The formula to calculate the moles of mercury is as follows:

[tex]{\text{Moles of Hg}} = \frac{{{\text{Given mass of Hg}}}}{{{\text{Molar mass of Hg}}}}[/tex]                               …… (2)

The given mass of Hg is 0.278 g.

The molar mass of Hg is 200.59 g/mol.

Substitute these values in equation (2).

[tex]\begin{aligned}{\text{Moles of Hg}}&=\left( {{\text{0}}{\text{.278 g}}}\right)\left({\frac{{{\text{1 mol}}}}{{{\text{200}}{\text{.59 g}}}}}\right)\\&=0.0013859\\&\approx{\text{0}}{\text{.001386 mol}}\\\end{gathered}[/tex]

The formula to calculate the moles of bromine is as follows:

[tex]{\text{Moles of Br}} = \frac{{{\text{Given mass of Br}}}}{{{\text{Molar mass of Br}}}}[/tex]                           …… (3)

The given mass of Br is 0.111 g.

The molar mass of Br is 79.90 g/mol.

Substitute these values in equation (3).

[tex]\begin{aligned}{\text{Moles of Br}}&=\left({{\text{0}}{\text{.111 g}}}\right)\left({\frac{{{\text{1 mol}}}}{{{\text{79}}{\text{.90 g}}}}}\right)\\&= 0.0013892\\&\approx{\text{0}}{\text{.001389 mol}}\\\end{gathered}[/tex]

Step 4: The moles of mercury and bromine are to be written with their corresponding subscripts.

So the preliminary formula becomes,

[tex]{\text{Preliminary formula of the compound}}={\text{H}}{{\text{g}}_{0.001386}}{\text{B}}{{\text{r}}_{0.001389}}[/tex]

Step: Each of the subscripts is divided by the smallest subscript to get the empirical formula.

In this case, the smallest one is 0.001386. So the empirical formula of the compound is written as follows:

[tex]\begin{aligned}{\text{Empirical formula of the compound}}&={\text{H}}{{\text{g}}_{\frac{{0.001386}}{{0.001386}}}}{\text{B}}{{\text{r}}_{\frac{{0.001389}}{{0.001386}}}}\\&={\text{H}}{{\text{g}}_1}{\text{B}}{{\text{r}}_{1.002}}\\&\approx {\text{HgBr}}\\\end{aligned}[/tex]

Therefore the empirical formula of the compound is [tex]{\mathbf{HgBr}}[/tex] .

Step 6: The empirical formula mass of the compound is to be calculated. This is done by using equation (4).

[tex]{\text{Empirical formula mass of HgBr}}=\left( 1 \right)\left({{\text{Atomic mass of Hg}}}\right) + \left(1\right)\left({{\text{Atomic mass of Br}}}\right)[/tex]

…… (4)

Substitute 200.59 g/mol for the atomic mass of Hg and 79.90 g/mol for the atomic mass of Br in equation (4).

[tex]\begin{aligned}{\text{Empirical formula mass of HgBr}}&=\left( 1 \right)\left({{\text{200}}{\text{.59 g/mol}}}\right) + \left( 1 \right)\left( {{\text{79}}{\text{.90 g/mol}}}\right)\\ &= 280.49\;{\text{g/mol}}\\\end{gathered}[/tex]

Step 7: The molar mass of the compound is divided by its empirical formula mass to get a whole number. The formula for this is as follows:

[tex]{\text{Whole - number multiple}} = \frac{{{\text{Molar mass of compound}}}}{{{\text{Empirical formula mass}}}}[/tex]                        …… (5)

Substitute 560 g/mol for the molar mass of the compound and 280.49 g/mol for the empirical formula mass of the compound in equation (5).

[tex]\begin{aligned}{\text{Whole - number multiple}}& = \frac{{{\text{560 g/mol}}}}{{{\text{280}}{\text{.49 g/mol}}}}\\&= 1.99\\&\approx2\\\end{aligned}[/tex]

Step 8: The empirical formula is multiplied by the whole number multiple to get the molecular formula. So the molecular formula of the compound is [tex]{\mathbf{H}}{{\mathbf{g}}_{\mathbf{2}}}{\mathbf{B}}{{\mathbf{r}}_{\mathbf{2}}}[/tex] .

Learn more:

1. Calculate the moles of ions in the solution: https://brainly.com/question/5950133

2. Calculate the moles of chlorine in 8 moles of carbon tetrachloride: https://brainly.com/question/3064603

Answer details:

Grade: Senior School

Subject: Chemistry

Chapter: Stoichiometry of formulas and equations

Keywords: empirical formula, Hg, Br, HgBr, Hg2Br2, subscript, moles of Br, moles of Hg, mass of Hg, mass of Br, molecular formula, 2, preliminary formula.

Which orbital block corresponds to the transition metals in the periodic table?

Answers

On the periodic table, the orbital blocks are broken up based on section. The first two rows (Alkali Metals, Alkaline Earth Metals) are the S block, the transition metals are the D block, the nonmetals/metalloids are the P block, and the extra elements at the bottom of the periodic table are the F block. Therefore, the answer would be “The D block”. Hope this helped!

I need Chemistry help (Connections Unit 6 Lesson 3)

1. A sample of gold (Au) has a mass of 35.12 g.
a. Calculate the number of moles of gold (Au) in the sample and record in
Table 1. Show your work.
b. Calculate the number of atoms of gold (Au) in the sample and record
in Table 1. Show your work.
2. A sample of table sugar (sucrose, C12H22O11) has a mass of 1.202 g.
a. Calculate the number of moles of C12H22O11 contained in the sample
and record in Table 1. Show your work.

Answers

1) Number of moles = mass of Au/ molar mass of Au
 Mass = 35.12g and molar mass = 196.699.
  Number of moles = 35.12/196.699 = 0.178

 2) The number of atoms or molecules in one mole of a substance, equal to 6.023 * 10^23.
 Hence it follows there are 6.0233 * 10^23 * 0.178 = 1.0702 * 10^23 atoms. 3) Number of moles of sucrose = mass/molar mass.
  Molar mass of C12H22O11 = (12*2) + (1*22) + (16 * 11) = 24 + 22 + 176 = 222
 Number of moles = 1.202/222 = 0.0054

Answer:

For 1a: The number of moles of gold are 0.178 moles.

For 1b: There are [tex]1.071\times 10^{23}[/tex] atoms of gold.

For 2: The number of moles of [tex]C_{12}H_{22}O_{11}[/tex] are 0.0035 moles.

Explanation:

To calculate the number of moles, we use the following formula:

[tex]Moles=\frac{\text{Given mass}}{\text{Molar mass}}[/tex]     .....(1)

For 1a:

We are given:

Given mass of Au = 35.12g

Molar mass of Au = 196.97 g/mol

Putting values in equation 1, we get:

[tex]\text{Moles of Gold}=\frac{35.12g}{196.97g/mol}=0.178moles[/tex]

Hence, the number of moles of gold are 0.178 moles.

For 1b:

To calculate the number of atoms in 0.178 moles of gold, we follow mole concept.

According to mole concept:

1 mole of an element contains [tex]6.022\times 10^{23}[/tex] number of atoms.


So, 0.178 moles of gold will contain [tex]0.178\times 6.022\times 10^{23}=1.071\times 10^{23}[/tex] atoms.

Hence, there are [tex]1.071\times 10^{23}[/tex] atoms of gold.

For 2:

We are given:

Given mass of [tex]C_{12}H_{22}O_{11}[/tex] = 1.202g

Molar mass of [tex]C_{12}H_{22}O_{11}[/tex] = 342 g/mol

Putting values in equation 1, we get:

[tex]\text{Moles of }C_{12}H_{22}O_{11}=\frac{1.202g}{342g/mol}=0.0035moles[/tex]

Hence, the number of moles of [tex]C_{12}H_{22}O_{11}[/tex] are 0.0035 moles.

Traumatic acid contains 63.13% carbon, 8.830% hydrogen, and 28.03% oxygen. its molar mass is 228 g/mol. determine the empirical and the molecular formulas of traumatic acid.

Answers

Q1)
firstly we need to determine the empirical formula of the compound. empirical formula is the simplest ratio of components in the compound.
percentages of the elements have been given, so lets assume we are calculating for a compound of 100g 
                                  C                               H                              O
mass                       63.13 g                    8.830 g                       28.03 g
molar mass             12 g/mol                   1 g/mol                      16 g/mol
number of moles     63.13/12                   8.830/1                      28.03/16
                                5.26                           8.830                           1.75
divide by the smallest number of moles 
                                5.26/1.75                   8.830/1.75                   1.75/1.75
                                = 3.01                        = 5.04                           =1
rounded off to the nearest whole numbers 
C - 3
H - 5
O - 1
therefore empirical formula = C₃H₅O

Q2)
we have to next determine the molecular formula of the compound 
molecular formula gives the actual composition of elements in the compound. 
since we know the empirical formula and molecular mass, we can find how many empirical units are in the molecular formula.
mass of empirical unit = Cx3 + Hx5 + Ox1
                                    = 12 g/mol x 3 + 1g/mol x 5 + 16 g/mol x 1
                                    = 36 + 5 + 16 = 57 g/mol
the molecular mass = 228 g/mol
then number of empirical units in the molecular formula = 228 / 57 = 4
therefore there are 4 empirical units 
then the molecular formula = 4 x empirical formula =4 (C₃H₅O)
molecular formula = C₁₂H₂₀O₄




which of the following types of molecular representations can be used to show differences between isomers? Explain why each can or cannot.

a) molecular formula
b) structural formula
c) 3D drawing or model,

Answers

Isomer is defined as compounds with the same formula but different arrangement of atoms in its molecule and they differ in their properties. The representation that can be used to show differences between isomers is the use of structural formula.  It shows the arrangement of each atoms. It cant be molecular formula and 3D drawing because it does not show the arrangement of the atoms.

Final answer:

Molecular formula, structural formula, and 3D drawing or model can be used to show differences between isomers.

Explanation:

The types of molecular representations that can be used to show differences between isomers are:

Molecular formula: The molecular formula gives only the number of each kind of atom present in a molecule. It does not provide any information about the structure of the molecule. For example, the molecular formula CH4O represents methanol, but it does not reveal the arrangement of the atoms.Structural formula: The structural formula shows how the atoms are connected in a molecule. It provides information about the arrangement of atoms and the bonds between them. For example, the structural formula of methanol (CH3OH) indicates that one carbon atom is bonded to three hydrogen atoms and one oxygen atom.3D drawing or model: A 3D drawing or model represents the three-dimensional structure of a molecule. It helps in visualizing the spatial arrangement of atoms. For example, a ball-and-stick model or a space-filling model can be used to show the differences in the arrangement of atoms between isomers.

Write a formula for the compound that forms from potassium and chromate.

Answers

Hello!

The compound that forms from potassium and chromate is Potassium Chromate (K₂CrO₄)

This compound has a yellow lime color and is used in enamels, leather finishes, stainless steels and for the identification of silver ion in a silver nitrate solution. It is a powerful oxidizing agent and is produced by the treatment of potassium chromate with potassium hydroxide. It is a very toxic compound an is a known carcinogenic agent.

Have a good day!

Final answer:

The formula for the compound that forms from potassium and chromate is K2CrO4, and the balanced equation for its dissolution in water is K2CrO4(s) → 2K+(aq) + CrO42-(aq) with the solubility product expression as Ksp = [K+]2 × [CrO42-].

Explanation:

The compound that forms from potassium and chromate has the formula K2CrO4. When this compound dissolves in water, it dissociates into ions. The balanced chemical equation representing the dissolution of potassium chromate is:

K2CrO4(s) → 2K+(aq) + CrO42-(aq)

The solubility product expression (Ksp) for this dissolution can be written as follows:

Ksp = [K+]2 × [CrO42-]

The relationship signifies the product of the squared concentration of potassium ions and the concentration of chromate ions is constant at a given temperature. This equilibrium expression is vital in predicting the solubility behavior of the compound in aqueous environments, guiding our understanding of its potential to form precipitates based on ion concentrations in solution.

Learn more about Potassium Chromate Formula here:

https://brainly.com/question/9128058

#SPJ12

what is the molar of mass of copper (II) sulfate CuSOu?

Answers

191.546,,,,,,,,,,,,,,,,,,,

What is always true of a weak acid ?

Answers

the answer is d per me

Answer: D. it only partially dissociates in solution.

Explanation:

Strong acid is defined as the acid which completely dissociates when dissolved in water. They have low pH. These releases [tex]H^+[/tex] ions in their aqueous states.

[tex]HNO_3(aq.)\rightarrow H^+(aq.)+NO_3^-(aq.)[/tex]

Weak acid is defined as the acid which does not completely dissociates when dissolved in water. They have high pH. These releases [tex]H^+[/tex] ions in their aqueous states.

[tex]CH_3COOH\rightleftharpoons CH_3COO^-+H^+[/tex]

Thus the correct option is it only partially dissociates in solution.

Please HELP ASAP HELP Think about the order of planets starting with the one closest to the sun, and moving outward. What two planets can be found on either side of Earth? A) Venus and Mars B) Mercury and Mars C) Venus and Mercury D) Mercury and Jupiter

Answers

your answer should be choice B:mercury and mars hope I helped
the answer is A. venus and mars being the 2nd and 4th planet

A fluid that vaporizes and condenses inside the tubing of a heat pump is called the.

Answers

I believe that is refrigerant! 
Hope this helps!
The answer is refrigerant. I have just did a full study upon the subject. I got 100% on my test.

What is the difference between anthropocentrism and biocentric views of the environment

Answers

Anthropocentrism vs. Thus, nothing in the environment is valuable for its own sake, but only for the benefit that it brings to humans. By contrast, biocentrism is the viewthat we have direct moral obligations to things in the environment for their own sake, irrespective of their impact on human interests.

Explanation:

Biocentrism is the thought of considering all the living beings in the bio diversity and the nature to be the main source  and aims at the well being of all as a whole.

         While anthropocentrism or homocentrism or sometimes called as altruistic is the philosophical thought that human beings are the most significant  or important entities in this world and all should strive for the over all development in the interest of the humans.

                Biocentric is more life centered while anthropocentrism is more human centered.

"what is the pressure of a 34.8-l gas sample containing 7.45 mol of gas at 19.9°c? (r = 0.0821 l • atm/(k • mol), 1 atm = 760 torr)"

Answers

You can solve this problem using ideal gas formula (PV=nRT). Remember that the temperature used is Kelvin, so 19.9°c would be: 19.9+ 273.15= 293.05°K

PV=nRT
P= nRT / V
P= 7.45 * 0.0821* 293.05 / 34.8
P= 5.15 atm = 3914.5 torr

Answer:

The gas pressure is 5.15 atm

Explanation:

Given:

Volume of gas, V = 34.8 L

Moles of gas, n = 7.45 moles

Temperature, T = 19.9 C

To determine:

Pressure, P of the gas

Explanation:

Based on the ideal gas equation:

[tex]PV = nRT[/tex]

where P = pressure, V = volume, n = moles, T = temperature, R = gas constant

[tex]P = \frac{nRT}{V} \\\\P = \frac{7.45\ moles*0.0821\ Latm/mol-K*(19.9+273)\ K}{34.8\ L} =5.15\ atm[/tex]

Calculate the external pressure that must be applied to seawater, 1.14 M total ion concentration at 10 degrees C if the maximum concentration allowed in the product water is 176 mg/L. Assume that all the dissolved salts in the product water is sodium chloride.

So, I know that I need to subtract the ion concentrations before using the pi=MRT formula, but I can't figure out how to convert mg/L into molarity. Please help!

Answers

C = 1.14 M , T = 10 + 273.15 = 283.15 K   salt concentration = 176 mg /L NaCl
π total = CRT = 1.14 x 0.0821 x 283.15 = 26.5 atm
mass of NaCl = 176 mg = 0.176 g
Molarity = [tex] \frac{0.176}{57.96} x \frac{1}{1L} = 3.0366 x 10^{-3} M [/tex]
maximum concentration allowed C = 3.0366 x 10⁻³ M
π max. conc. = 2 x 3.0366 x 10⁻³ x 0.0821 x 283.15 = 0.141 atm
π external = π total - π max. conc.
                 = 26.5 - 0.141 = 26.3 atm

what is this ch3ch2ch2ch2ch2ch3 ???

Answers

ch3ch2ch2ch2ch2ch3 Is called Hexane, it is a colorless liquid hydrocarbon
Final answer:

CH3CH2CH2CH2CH2CH3 represents Hexane, a chemical compound in the alkane family, which are hydrocarbons with only single bonds. Hexane has six carbon atoms and 14 hydrogen atoms.

Explanation:

The formula CH3CH2CH2CH2CH2CH3 represents a compound called Hexane. It follows a chain structure with six carbon atoms and 14 hydrogen atoms. The prefix 'hex-' denotes six, indicating six carbon atoms, and '-ane' denotes a single bond between the carbon atoms. The molecule is classified as an alkane, a member of a group of hydrocarbons (compounds made up of hydrogen and carbon) in which there are only single bonds. Alkanes are also known as saturated hydrocarbons.

Learn more about Chemistry here:

https://brainly.com/question/36629312

#SPJ6

Which of the compounds, c3h8, mgcl2, zn(no3)2, ocl2, are expected to exist as molecules?

Answers

The answer is C3H8 and OCl2  they are molecular compounds. MgCl2 is an ionic compound while Zn(NO3)2 is an inorganic chemical compound. 
Molecular compounds are covalent compounds in which the elements share electrons via covalent bonds. They are inorganic compounds that take the form of discrete molecules, for example water and carbon dioxide.

Explanation:

A molecular compound is a compound in which atoms share electrons with each other and thus, forms covalent bonds. As a result, molecular compounds are covalent compounds.

In the compound [tex]C_{3}H_{8}[/tex], since hydrogen atom has only one electron and carbon atom has 4 electrons in its valence shell. So, in order to completely fill its octet both carbon and hydrogen will share electrons with each other.

Therefore, [tex]C_{3}H_{8}[/tex] is a covalent compound. Hence, it is also a molecular compound.

In [tex]MgCl_{2}[/tex], magnesium being a metal has excess of electrons and chlorine being a non-metal has deficiency of electrons. Thus, magnesium donates its two electrons to both the chlorine atoms and forms an ionic bond.

Hence, [tex]MgCl_{2}[/tex] is an ionic compound. Thus, it is not a molecular compound.

In [tex]OCl_{2}[/tex], both oxygen and chlorine are non-metals. Hence, they have deficiency of electrons. As a result, both oxygen and chlorine will share electrons in order to complete their octet.

So, there will be formation of covalent bonds. Thus, [tex]OCl_{2}[/tex] is a molecular compound.

[tex]Zn(NO_{3})_{2}[/tex] is an inorganic compound and dissolves in water to form ions of [tex]Zn^{2+}[/tex] and [tex]NO^{-}_{3}[/tex]. Hence, [tex]Zn(NO_{3})_{2}[/tex] is an ionic compound.

Thus, we can conclude that out of the given options, [tex]C_{3}H_{8}[/tex] and [tex]OCl_{2}[/tex] exists as molecules.

Assuming that the density of vinegar is 1.005 g/mL, calculate the molarity of acetic acid in vinegar from your average value for the mass percentage of acetic acid in vinegar. Density of vinegar= 1.005 g/mL Average mass % acetic acid= 5.2%,

Answers

Final answer:

To calculate the molarity of acetic acid in vinegar, convert the average mass percentage of acetic acid to grams, then convert grams to moles, and finally divide the moles by the volume in liters. The molarity of acetic acid in vinegar is 0.866 M.

Explanation:

To calculate the molarity of acetic acid in vinegar, we need to first convert the average mass percentage of acetic acid to grams. Assuming we have 100g of vinegar, the mass of acetic acid would be 5.2g (5.2% of 100g). Next, we need to convert grams of acetic acid to moles. The molar mass of acetic acid is 60.05 g/mol. Dividing the mass by the molar mass gives us the number of moles. Finally, we can calculate the molarity by dividing the moles by the volume in liters. Since the density of vinegar is given as 1.005 g/mL, we can assume the volume of 100g of vinegar is 100 mL, or 0.1 L.

Step 1: Convert mass percentage to grams: (5.2% x 100g) = 5.2gStep 2: Convert grams to moles: (5.2g / 60.05 g/mol) = 0.0866 molStep 3: Calculate molarity: (0.0866 mol / 0.1 L) = 0.866 M

Learn more about Calculating molarity of acetic acid in vinegar here:

https://brainly.com/question/32922378

#SPJ12

Final answer:

The molarity of the acetic acid in the vinegar is 0.871 M, calculated by finding the mass of acetic acid in a certain volume of vinegar and then using that to determine the number of moles of acetic acid and thus the molarity.

Explanation:

To get the molarity (M) of acetic acid in vinegar, we need to first find the mass of acetic acid in a certain volume of vinegar since molarity (M) is defined as moles of solute/liters of solution. The given data implies that 5.2% of the vinegar's mass is due to acetic acid. Hence, given vinegar's density (1.005 g/mL), in 1000 ml (or 1 liter) of vinegar, mass of vinegar = density * volume = 1.005 g/mL * 1000 mL = 1005 g. Given that 5.2% of this mass is acetic acid, mass of acetic acid is 5.2/100 * 1005 = 52.26g.

The molecular mass of acetic acid (CH3COOH) is approximately 60 g/mol. So, the number of moles of acetic acid = mass of acetic acid / molecular mass = 52.26 g / 60 g/mol = 0.871 moles. Therefore, the molarity (M) = moles of solute/liters of solution = 0.871 moles / 1 L = 0.871 M.

Learn more about Molarity here:

https://brainly.com/question/8732513

#SPJ2

#1: In the electromagnetic spectrum, which of the following types of radiation has less energy than visible light?
A. microwaves

B. ultraviolet

C. X rays

D. gamma rays
**my answer: A. microwaves

Answers

A microwaves. X Rays, gamma rays, and UV light all have higher frequencies, shorter wave lengths, and higher energy than visible light. However, microwaves have lower frequencies, longer wave lengths, and lower energy than visible light.

Microwaves have lower energy than visible light in the electromagnetic spectrum. Infrared radiation is used by heat-sensitive cameras to detect heat loss, and is also the type of radiation that can be felt as heat by our skin. Radio waves have the longest wavelengths and hence the lowest energy within the electromagnetic spectrum.

The answer to the question 'which of the following types of radiation has less energy than visible light?' is A. microwaves. Microwaves are part of the electromagnetic spectrum with longer wavelengths and thus lower energy than visible light. In contrast, ultraviolet (B), X-rays (C), and gamma rays (D) all have shorter wavelengths and higher energy than visible light. The electromagnetic spectrum ranges from radio waves, which have the longest wavelengths and lowest energy, to gamma rays, which have the shortest wavelengths and highest energy. Microwaves are in between these two extremes but still have lower energy compared to visible light.

Answering question 3, the waves used to show heat loss with heat sensitive cameras are A- Infrared radiation. Infrared waves are emitted as heat by objects and can be detected by thermal cameras to show heat patterns.

For question 4, the rays that can be felt as heat are B- Infrared Radiation. These are the same waves that are commonly used in heat sensing devices and contribute to the natural warmth felt from sunlight.

Question 2 asks about electromagnetic waves with the longest wavelengths; the answer here is D- radio waves. They are at the opposite end of the spectrum compared to gamma rays, with the lowest frequencies and energy levels.

For the balanced equation shown below, how many moles of O2 will react with 0.3020 moles of CO2?
2C2H5OH + 6O2 → 4CO2 + 6H2O

0.151 moles O2


0.201 moles O2


0.302 moles O2


0.453 moles O2

Answers

Answer is: 0,453  moles of oxygen will react with 0.3020 moles of carbon(IV) oxide.
n(CO₂) = 0,302 mol.
From chemical reaction: n(CO₂) : n(O₂) = 4 : 6.
n(O₂) = 6 · 0,302 mol ÷ 4.
n(O₂) = 0,453 mol.
n - amount of substance.

Answer : The number of moles of [tex]O_2[/tex] react will be, 0.453 moles

Solution : Given,

Moles of [tex]CO_2[/tex] = 0.3020 moles

The balanced chemical reaction is,

[tex]2C_2H_5OH+6O_2\rightarrow 4CO_2+6H_2O[/tex]

From the balanced reaction, we conclude that

As, 4 moles of [tex]CO_2[/tex] produces form 6 moles of [tex]O_2[/tex]

So, 0.3020 moles of [tex]CO_2[/tex] produces from [tex]\frac{6}{4}\times 0.3020=0.453moles[/tex] of [tex]O_2[/tex]

Therefore, the number of moles of [tex]O_2[/tex] react will be, 0.453 moles

Word equation for Cu(s)+O2(g)=CuO(s)

Answers

Answer:

Copper solid plus oxygen gas giving solid cupric oxide

Explanation:

The given reaction is:

[tex]Cu(s) +O2(g)\rightarrow CuO(s)[/tex]

The balanced equation is:

[tex]2Cu(s) +O2(g)\rightarrow 2CuO(s)[/tex]

The formula name of the reactants and products are:

Cu (s) = copper in the solid phase

O2 (g) = oxygen in the gas phase

CuO (s) = copper (II) oxide or cupric oxide

The word equation would be:

Copper solid plus oxygen gas giving solid cupric oxide

Word equations are the representation of the element names in the place of symbols. Copper (s) + Oxygen (g) → Cupric oxide (s) is the word equation for Cu(s) + O₂(g) → CuO(s).

What is a word equation?

The reaction in which the molecules are added to give one or more compounds and also undergoes increases in oxidation number of the species are called oxidative addition reaction.

The chemical reaction given is,

[tex]\rm Cu (s) + O_{2} (g) \rightarrow CuO(s)[/tex]

The equation can be balanced as:

[tex]\rm 2Cu (s) + O_{2} (g) \rightarrow 2CuO(s)[/tex]

The word or the chemical names of the reactants and products are given as:

Cu (s) = copper (solid phase)

[tex]\rm O_{2} (g)[/tex] = oxygen (gas phase)

CuO (s) = cupric oxide or copper (II) oxide

Inserting the chemical names in the reaction:

[tex]\rm Copper (s)+ Oxygen (g) \rightarrow \rm Cupric\; oxide (s)[/tex]

Therefore, [tex]\rm Copper (s)+ Oxygen (g) \rightarrow \rm Cupric\; oxide (s)[/tex]  is the word equation.

Learn more about word equations here:

https://brainly.com/question/15165516

"each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei" and is radioactive is:

Answers

The answer is Isotope. Isotopes; each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element. For example, carbon-12, carbon-13 and carbon-14 are three isotopes of the element carbon with mass numbers 12,13 and 14 respectively. 

what astronomical equiptment did hypatia use?

Answers

Hypatia used an astrolabe.

Other Questions
The first place in the united states to extend equal voting rights to women was: A nurse is caring for a client with severe depression. the client reports changes in appetite and sleep pattern and has lost her job because of the effects of her depression. the client has two young children at home and states, "i just wish things could be like they were. i feel so helpless that i can't even get out of bed in the morning." the physician has ordered electroconvulsive therapy (ect) for the client in addition to her current antidepressant medications. a nurse evaluates the ect therapy as effective when the client: Grace whistles while tickling khaleel with a feather. eventually, khaleel starts to squirm and giggle every time grace whistles, even when he is not being tickled. in this example, squirming and giggling is a(n) ________. At the end of the Spanish American war which was not one of the terms agreed to in the treaty of paris What are hippolyta and theseus discussing as the play opens? 2. how does hippolyta come to be betrothed to theseus? 3. what is egeus' complaint when he storms into the scene? 4. what three choices does theseus give hermia? The applause showed how deeply the presentation had ____ the audience The price of oil recently went from $7.80 to$10.40 per case of quarts. Find the ratio of the increase in price to the original price. Field studies are used to study animals in the laboratory?True or false cody has $700 in a savings account that pays 4% simple interest how much will he have in one year Which sentence is written using formal language? A)My bad, I thought you called my name. B)Tonya is driving me up the wall with her stories. C)I ain't got no way to get to the dance on Saturday. D)The comments she made during the interview were quite offensive. If your BAL is .07, you can expect a ____ drop in complex performance compared to the sober level. 36% 17% 13% 24% John Cage became interested in chance music after studying A. early film scores. B. modern dance. C. baroque opera. D. the I Ching. Clay minerals formed from gabbro or diorite bedrock illustrate which kind of weathering? Match the part of the cell to its correct function.1.vacuole2.cell membrane3.cytoplasm4.mitochondrion5.Golgi body6.cell wall7.lysosome8.chloroplast9.endoplasmic reticulum10.DNA11.ribosome12.nucleusa.contains instructions on how the cell functions.b.controls the activities of the cell.c.supports and protects the organelles in the cell.d.strong layer around plant cells.e.controls what goes in and comes out of a cell.f.helps in the production and movement of materials.g.packages and distributes materials in and out of cells.h.supplies energy that cell uses.i.produces proteins for the cell.j.converts energy from the sun to food energy.k.serves as a temporary storage area for nutrients and waste materials.l.breaks down waste materials. Julian and Nina are playing a game. Their scores for five games are shown in the table below.Julians and Ninas ScoresJulians Scores4241465038Ninas Scores4727453249Which statement comparing the medians to the ranges is true?The medians differ by 3, but the ranges differ by 10.The medians differ by 3, but the ranges differ by 2.The medians differ by 1, but the ranges differ by 10.The means differ by 1, but the ranges differ by 2. The christians in holland would not allow candide to beg. a. True b. False Question 7 of 25 (1 point)Jump to Question: One of the main responsibilities employers have under OSHA is to: A. Conduct energy audits B. Notify OSHA of any workplace injury or illness C. Provide training required by OSHA standards D. Reduce air pollution in the environment The compound, A2Z3, is a made-up compound. If this is an ionic compound, name two elements that A & Z may be? I need to collect data for this table please someone help Three of the angles of a quadrilateral are 120 48 and 92 what is the size of the fourth angle