A sample of gas occupies 280 mL when the pressure is 560.00 mm Hg . If the temperature remains constant , what is the new pressure if the volume changes to 560.0 mL?

Answer: The Answer is B. X: Sodium, Y: Potassium

Explanation: No Explanation I just Guessed. Hope This Help's Someone

Answer:

The answer is

X:Sodium Y:Potassium

Explanation:

I took the course and got it right

Answer:

There are no caterpillars on the oak tree in winter. ... Some farmers spray their crops with chemicals to kill insects and weeds. ... Some farmers leave a strip of land around the edge of each field which they do not spray with chemicals.

Explanation:

Hope this help ;)

Farmers leaving unsprayed strips of land can increase partridge numbers due to safer habitats free from pesticides and better provision of food and nesting areas.

Leaving a strip of land around the edge of each field unsprayed with chemicals will likely increase the number of partridges on these farms for two main reasons.

Crop rotation is also a practice that allows farmers to improve soil fertility, diversify their crops, and reduce pesticide costs by breaking the cycle of weeds, insects, and diseases naturally.

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Answer:

Preceding accumulative aggregate of energy indispensable is disseminated as 5455 J.

Explanation:

Allotted the contiguous information:

Q: Not identified.

M: 224 g

S: 0.343 J/g°C

Final thermodynamics: 71°C

Initial thermodynamics: 0°C

ΔT = 71°C

We can equate as imminent:

Q = 224 g · 0.343 J/g°C · 71°C

Q ⇒ 5455 J

Hence, the pertaining preeminent albeit paramount indispensable consignment or quantity of energy obligated, concerning an augmentation in thermodynamics subject to the undisclosed metal by 71°C is 5,455 J.

The energy required to raise the temperature of the metal is 5365.256 J.

To calculate the energy required to raise the temperature of a substance, we use the formula:

q = m * c * ΔT

The energy required to raise the temperature of a substance can be calculated using the formula: q = mcΔT where q is the energy in joules, m is the mass in grams, c is specific heat capacity in J/(g•°C), and ΔT is the change in temperature in °C.

Given that the mass (m) of the metal is 224 g, the specific heat capacity (c) is 0.343 J/(g•°C), and the temperature change (ΔT) is 71°C, you can substitute these values into the formula:

Plugging in the values given:

q = (224 g) * (0.343 J/(g•°C)) * (71°C)

Simplifying the equation gives:

q = 5365.256 J

Therefore, the energy required to raise the temperature of 224 g of this metal by 71°C is 5365.256 J.

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Answer: Temperature is a measure of the kinetic energy of particles in a substance. As temperature increases, the atoms or molecules in a substance gain energy. As temperature decreases, the particles lose energy. A change in the energy of particles causes a change in their arrangement. A change in the arrangement of particles can lead to a physical change.

Explanation:

In the periodic table, Francium has the largest atomic size, Chlorine has the highest electron affinity, Barium has the lowest ionization enthalpy in Group II, and gaseous elements at room temperature include noble gases and some non-metals like Fluorine and Oxygen.

The periodic table organizes elements in such a way that we can predict their properties based on their position. These properties, including atomic size, electron affinity, and ionization enthalpy, show clear patterns or trends within the table. As a tutor from the Brainly platform, let's address the specific properties asked in the question.

Answer : The final volume at STP is, 1000 L

Explanation :

According to the Boyle's, law, the pressure of the gas is inversely proportional to the volume of gas at constant temperature and moles of gas.

[tex]P\propto \frac{1}{V}[/tex]

or,

[tex]P_1V_1=P_2V_2[/tex]

where,

[tex]P_1[/tex] = initial pressure = 1520 mmHg = 2 atm    (1 atm = 760 mmHg)

[tex]P_2[/tex] = final pressure at STP = 1 atm

[tex]V_1[/tex] = initial volume = 500.0 L

[tex]V_2[/tex] = final volume at STP = ?

Now put all the given values in the above formula, we get:

[tex]2atm\times 500.0L=1atm\times V_2[/tex]

[tex]V_2=1000L[/tex]

Therefore, the final volume at STP is, 1000 L

The volume of the gas at STP is [tex]\(1000.0 \, \text{L}\)[/tex].

1. Convert initial pressure to atm:

  [tex]\[ P_1 = \frac{1520 \, \text{mm Hg}}{760 \, \text{mm Hg/atm}} = 2 \, \text{atm} \][/tex]

2. Apply the Combined Gas Law:

  [tex]\[ \frac{P_1 \cdot V_1}{T_1} = \frac{P_2 \cdot V_2}{T_2} \][/tex]

  Given:

  [tex]\[ V_1 = 500.0 \, \text{L} \][/tex]

  [tex]\[ P_1 = 2 \, \text{atm} \][/tex]

  [tex]\[ P_2 = 1 \, \text{atm} \][/tex]

  [tex]\[ T_1 = T_2 \][/tex] (temperature does not change)

  Substituting the values, we get:

  [tex]\[ \frac{(2 \, \text{atm} \cdot 500.0 \, \text{L})}{T} = \frac{(1 \, \text{atm} \cdot V_2)}{T} \][/tex]

3. Solve for [tex]\(V_2\)[/tex]:

  Cross-multiply and solve for [tex]\(V_2\)[/tex]:

  [tex]\[ 2 \cdot 500.0 = 1 \cdot V_2 \][/tex]

  [tex]\[ V_2 = \frac{2 \cdot 500.0}{1} \][/tex]

  [tex]\[ V_2 = 1000.0 \, \text{L} \][/tex]

Answer:

3. 3:2

Explanation:

in the reactants, 3 is the coefficient for the hydrogen atoms.

In the products, 2 is the coefficient for the ammonia atoms.

Answer:

The greater the change in free energy (ΔG0′), and the greater the energy released

Explanation:

Recall that the change in free energy is given by:

∆G°'= nFE°'

But E° is given by E°acceptor - E°donor

Hence the greater the difference between E°acceptor and E°donor, the greater the value of E° and consequently the greater the value of ∆G° and the energy released.

Note: E°acceptor and E°donor refer to reduction potentials of donor and acceptor

Answer:

Explanation:

q = (mass) (temp change) (specific heat)

q = (10000 g) (40 °C) (0.385 J/g⋅°C) = 154000 J = 154 kJ

154 kJ / 2220 kJ/mol = 0.069369369 mol

0.069369369 mol times 44.0962 g/mol = 3.06 g (to three sig figs)

answer choice 4

The heat of combustion ([tex]\Delta[/tex]Hc0) is the amount of energy released as heat when a compound completely burns with oxygen under standard conditions.

3.05988g. grams of propane must be burned to raise the temperature of a 10.0 kg block of copper from 25.0°C to 65.0°C.

q=m*c*(change of T)

q=10000g(0.385J/g*c)*(65.0C-25.0C)or (338.2 K-298.2K)

q=154000J

154000J*(1 mol/2220 KJ)=69.36936 x [tex]10 ^-3[/tex] mol

here's where I'm stuck

0.069369 mol

and i know that for every 1 mol there is 44.11g of C3H8.

0.069369 mol* (44.11g C3H8)/1mol = 3.05988g.

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Answer:

Im 90% sure its 3.

Explanation:

Answer:

4

Explanation:

Answer:

Liquid B because of its higher vapor pressure due to the fact that evaporation rate is directly proportional to vapor pressure

Explanation:

The vapor pressure of  liquid at equilibrium is a function to the liquid's rate of evaporation. The evaporation rate and hence the vapor pressure is a measure of the propensity of the particles  of the liquid to leave the surface of the liquid and exist as vapor directly above the liquid. As high evaporation rate leads to high vapor pressure, a liquid with a higher vapor pressure will evaporate faster than one with a lower vapor pressure at the same temperature and pressure.

Therefore, liquid B with a vapor pressure of 18.04 kPa at 40° C will evaporate faster than liquid A with a lower vapor pressure of 7.37 kPa at the same 40°C.

Liquid B with a higher vapor pressure of 18.04 kPa at 40°C would evaporate faster than liquid A with 7.37 kPa, as higher vapor pressure indicates that the liquid is more volatile and its molecules can more easily escape into the gas phase.

At 40°C, between liquid A with a vapor pressure of 7.37 kPa and liquid B with a vapor pressure of 18.04 kPa, liquid B would evaporate faster. This is because vapor pressure is a measure of the tendency of molecules to escape from a liquid and enter the gas phase. A higher vapor pressure indicates that molecules can break away from the surface of the liquid more easily, which is indicative of a more volatile liquid. Therefore, liquid B, with its higher vapor pressure at the same temperature, is the more volatile and will evaporate more rapidly than liquid A.

Vapor pressure of a liquid is directly related to its intermolecular forces; liquids with weaker intermolecular forces have higher vapor pressures, and hence they evaporate faster. Conversely, greater intermolecular forces result in a lower vapor pressure and slower evaporation rate. For volatile liquids in a mixture, adding their partial pressures yields the total vapor pressure of the mixture

You purchase several rolls of fiberglass insulation and pay extra for installation. This is a service.

The majority of homes include fibreglass, an insulation substance made of incredibly thin glass fibres. It is frequently used in two forms of insulation: loose-fill and batts and rolls. Additionally, rigid boards or duct insulation are both options.

In accordance with the U.S. Department of Energy, manufacturers already make medium- and high-density fibreglass batt insulation materials with a little better R-Value than regular batts. Unfinished floors, ceilings, and walls can all be filled with fibreglass. It is set in place between beams, joists, and studs. You purchase several rolls of fiberglass insulation and pay extra for installation. This is a service.

Therefore, fiberglass insulation is a service.

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Answer:

Vapor pressure of solution is 736mmHg

Explanation:

Vapor pressure of an ideal solution follows Raoult's law:

[tex]P_{solution} = X_{solvent}P_{solvent}[/tex]

Where P is vapor pressure and X is mole fraction

Moles of glucose are:

48.4g × (1mol / 180.156g) = 0.2687mol glucose

Moles of water:

151.2g × (1mol / 18.1g) = 8.354 mol water

Thus, mole fraction of water (Solvent) is:

8.354 mol / (8.354 mol + 0.2687mol) = 0.9688

Vapor pressure of a solvent at boiling point is equal to atmospheric pressure (760mmHg). Replacing in Raoult's law:

[tex]P_{solution} = 0.9688*760mmHg[/tex]

Vapor pressure of solution is 736mmHg

The vapor pressure of the solution will be "736 mmHg".

According to the question,

Sample of glucose = 48.4 g

Mass of water = 151.2 g

Temperature = 100°C

Now,

Moles of glucose will be:

= 48.4 × ([tex]\frac{1 \ mol}{180.156}[/tex])

= 0.2687 mol

Moles of water will be:

= 151.2 × ([tex]\frac{1 \ mol}{18.1}[/tex])

= 8.354 mol

Water's moles fraction will be:

= [tex]\frac{Moles \ of \ water}{Moles \ of \ water +Glucose}[/tex]

By substituting the values,

= [tex]\frac{8.354}{8.354+0.2687}[/tex]

= 0.9688

hence,

By using Raoult's Law,

→ [tex]P_{solution}[/tex] = [tex]X_{solvent} P_{solvent}[/tex]

By substituting the values,

                = 0.9688 × 760

                = 736 mmHg

Thus the above solution is correct.55

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Answer:

volume of solution L =0.54 L

Explanation:

Given data:

Molarity of NaCl solution = 3.70 M

Mass of NaCl = 118 g

Solution:

First of all we will calculate the number of moles.

Number of moles = mass/ molar mass

Number of moles = 118 g/ 58.5 g

Number of moles = 2 mol

Now we will calculate the volume from molarity formula:

Molarity = number of moles / volume of solution L

3.70 M = 2 mol / volume of solution L

volume of solution L = 2 mol / 3.70 M

volume of solution L =0.54 L

Answer:

D) 2, 4, and 5

Explanation:

In order to fully comprehend the answer choices we must take a close look at the value of ΔH° = 31.05. The enthalpy change of the reaction is positive. A positive value of enthalpy of reaction implies that heat was absorbed in the course of the reaction.

If heat is absorbed in a reaction, that reaction is endothermic.

Since ∆Hreaction= ∆H products -∆H reactants, a positive value of ∆Hreaction implies that ∆Hproducts >∆Hreactants, hence the answer choice above.

Answer:

D

Explanation:

Answer:

6.58 atm total

3.29 atm NO2

3.29 atm O2

Explanation:

Balanced equation:

O3 + NO → NO2 + O2

There are equal numbers of moles of both reactants, so neither is in excess and either could be considered the limiting reactant.

( 1.30 mol NO) x (1 mol NO2 / 1 mol NO) =  1.30 mol NO2

( 1.30 mol NO) x (1 mol O2 / 1 mol NO) =  1.30 mol O2

Total pressure by using the formula;

P = nRT / V

= ( 1.30 mol +  1.30 mol) x (0.08205746 L atm/K mol) x (401.0 K) / (13.0 L)  

= 6.58 atm

Partial pressure for NO2;

(6.58 atm) x (1.30 mol NO2) / (1.30 mol + 1.30 mol)

= 3.29 atm NO2

Partial pressure for O2

6.58 atm total - 3.29 atm NO2

= 3.29 atm O2

1. The partial pressure of nitrogen dioxide ([tex]NO_2[/tex]) is equal to 3.29 atm.

2. The partial pressure of oxygen gas ([tex]O_2[/tex]) is equal to 3.29 atm.

3. The total pressure in the flask at the end of the chemical reaction is 6.58 atm.

Given the following data:

Scientific data:

To determine the partial pressure of each product and the total pressure in the flask at the end of the chemical reaction:

First of all, we would write a balanced chemical equation for the chemical reaction as follows:

                                  [tex]O_3 + NO \rightarrow NO_2+O_2[/tex]

Since the numbers of moles of reactants are equal, the total number of moles of products is:

[tex]n=1.3+1.3[/tex]

n = 2.6 moles

Now, we can find the total pressure in the flask at the end of the chemical reaction by using the ideal gas law equation;

[tex]PV=n RT[/tex]

Where;

Making P the subject of formula, we have;

[tex]P=\frac{nRT}{V}[/tex]

Substituting the parameters into the formula, we have;

[tex]P=\frac{2.6 \times 0.0821 \times 401}{13}\\\\P=\frac{85.597}{13}[/tex]

Total pressure, P = 6.58 atm.

Next, we would determine the partial pressure of each product:

[tex]Molefraction \;of \;a \;substance =\frac{No.\; of \; moles \;of \;substance}{Total \;no. \;of \; moles \;of \;substances}[/tex]

[tex]Molefraction \;of \;a \;substance =\frac{1.3}{2.6} \\\\Molefraction \;of \;a \;substance =0.5[/tex]

For [tex]NO_2[/tex]:

[tex]Partial \;pressure = Molefraction \times Total\;pressure\\\\Partial \;pressure = 0.5 \times 6.58[/tex]

Partial pressure of [tex]NO_2[/tex] = 3.29 atm.

For [tex]O_2[/tex]:

[tex]Partial \;pressure = Molefraction \times Total\;pressure\\\\Partial \;pressure = 0.5 \times 6.58[/tex]

Partial pressure of [tex]O_2[/tex] = 3.29 atm.

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Answer:

2.4 L

Explanation:

Given data:

Mass of LiF = 19.6 g

Molarity of solution = 0.320 M

Volume of water used = ?

Solution:

Number of moles = mass/molar mass

Number of moles = 19.6 g/ 26 g/mol

Number of moles = 0.75 mol

Volume required:

Molarity = number of moles/ volume in L

0.320 M = 0.75 mol /  volume in L

Volume in L = 0.75 mol  /0.320 M

      M = mol/L

Volume in L = 2.4 L

For a reaction system at equilibrium, LeChatelier's principle can be used to predict the "effect of a stress on the system".

Option: C

Explanation:

Le Chatelier's theory can be implemented to forecast a system's behavior due to variations in pressure, temperature, or concentration that will lead in predictable and contested variations in the system adjustments to establish a new state of equilibrium. This means that adding heat to a process would favor the endothermic path of a reaction, because this decreases the amount of heat generated in the system.

Here shift in equilibrium take place when volume increase, the total pressure decreases, which have potential to reverse the reaction, while on increasing pressure of system, the total volume decreases of the gaseous system, which can shift an equilibrium in the direction of the fewer molecules.

For a reaction system at equilibrium, the Le principle can be used to predict the effect of a stress on the system.

The Le principle is an observation about chemical equilibria of reactions. Le principle can be used to predict the effect of a stress like changing concentration of a substance has on a reaction system at equilibrium.

If the concentration of a reaction species is increased at constant Temperature and Volume, the equilibrium system will shift in the direction that reduces the concentration of that substance so we can conclude that the Le principle can be used to predict the effect of a stress on the system.

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Answer:

5.03 moles

Explanation:

Find the molar mass of C5H12 and you will get 72.17 g/mol

Next to find the number of moles, you divide 362.8 by the molar mass and you get

(362.8 g)/(72.17 g/mol)= 5.03 moles

Answer: lithium + oxygen Right arrow. lithium oxide

lithium + oxygen proper arrow. lithium oxide This equation indicates lithium oxide is formed from the reaction between oxygen and lithium.

Lithium oxide is used as a flux in ceramic glazes and creates blues with copper and pinks with cobalt. Lithium oxide reacts with water and steam, forming lithium hydroxide, and needs to be isolated from them.

Lithium Oxide is an extraordinarily insoluble thermally stable Lithium source suitable for glass, optic, and ceramic programs. Lithium oxide is a white stable also referred to as lithia, it is produced whilst lithium metallic burns inside the presence of oxygen.

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Answer:

7.

Explanation:

A neutral solution has a pH=7.

A basic solution has a pH>7.

An acidic solution has a pH<7.

Answer:

7,7,7

Explanation:

Answer:

i think its 1 liter of oxygen , a gas

Final answer:

One liter of oxygen gas is the most compressible among the options given, due to the significant spaces between gas molecules allowing for easier compression.

Explanation:

When considering the compressibility of various substances at room temperature, gases such as oxygen are the most compressible due to the large spaces between their molecules. In comparison, liquids like water and mercury are less compressible because their molecules are closer together, but they still offer some degree of compressibility. Solids like iron, however, are much less compressible because their atoms are tightly packed in a lattice structure. Of the options provided, one liter of oxygen gas would be the most compressible, as the spacing between gas molecules allows them to be pushed closer together far more easily than molecules in a liquid or atoms in a solid.

Answer:

The answer is 20.6 grams.

Explanation:

Molality describes the concentration of a solution. It can be defined as the number of moles of a solute dissolved in 1 kilogram of solvent. Then it is equal to the moles of solute (the substance that dissolves) divided by the kilograms of solvent (the substance used to dissolve):

[tex]Molality=\frac{number of moles of solute}{kilogram of solvent}[/tex]

The molality is expressed in units ([tex]\frac{moles}{kg}[/tex]).

So, you can apply the following rule of three with the solution being 0.5 molal: if in 1 kg of solution there are 0.5 moles of solute, in 0.4 kg (400 g, being 1kg = 1000g) how many moles of solute are there?

[tex]moles=\frac{0.4 kg*0.5 moles}{1 kg}[/tex]

moles=0.2 moles

Now, you know:

Then, The molar mass of sodium bromide NaBr is

NaBr= 23 g/mole + 80 g/mole= 103 g/mole

Now a new rule of three applies, if in 1 mole of sodium bromide there are 103 grams, in 0.2 mole how much mass is there?

[tex]mass=\frac{0.2 moles*103 grams}{1 mole}[/tex]

mass= 20.6 grams

The answer is 20.6 grams.

Answer:

The answer to your question is 0.41 moles

Explanation:

Data

moles of NaCl = ?

mass of NaCl = 24 g

Process

To solve this problem just calculate the molar mass of NaCl, and remember that the molar mass of any substance equals to 1 mol.

1.- Calculate the molar mass

NaCl = 23 + 35.5 = 58.5 g

2.- Use proportions and cross multiplication

               58.5 g of NaCl ------------------- 1 mol

               24.0 g               ------------------- x

                     x = (24 x 1) / 58.5

                     x = 0.41 moles

Answer:

testing

Explanation:

some scientist somewhere made acid and probably forgot the recipe/ingredients so they kept making it and used plastic to see if it would melt it

Answer:

B. Single Replacement

Explanation:

Single replacement:

It is the reaction in which one elements replace the other element in compound.

AB + C → AC + B

Chemical equation:

2HgO + Cl₂ → HgCl + O₂

This is the single replacement reaction. In this reaction chlorine replace the oxygen from mercury oxide and form mercury chloride.

Other options are incorrect because,

Decomposition reaction:

It is the reaction in which one reactant is break down into two or more product.

AB → A + B

Synthesis reaction:

It is the reaction in which two or more simple substance react to give one or more complex product.

A + B → AB

Double replacement:

It is the reaction in which two compound exchange their ions and form new compounds.

AB + CD → AC +BD

Answer:

      [tex][SOCl_2]=0.0218M[/tex]

Explanation:

The equations for a first order reaction are:

      [tex]\dfrac{d[A]}{dt}=-k[A][/tex]

      [tex][A]=[A_0]e^{-kt}[/tex]

      [tex]t\frac{1}{2}=\dfrac{\ln 2}{k}[/tex]

1. Calculate the constant of reaction, k:

Use the equation

                                [tex]t\frac{1}{2}=\dfrac{\ln 2}{k}[/tex]

     [tex]8.75h=\dfrac{\ln 2}{k}[/tex]

     [tex]k=\dfrac{\ln 2}{8.75h}[/tex]

     [tex]k\approx 0.0792168h^{-1}[/tex]

2. Calculate the concentration after 17.0 hours

Use the equation

                               [tex][A]=[A_0]e^{-kt}[/tex]

      [tex][SOCl_2]=0.0837M\cdot e^{-0.0792168h^{-1}\times 17.0h}[/tex]

      [tex][SOCl_2]=0.0218M[/tex]

Answer:

I got .146 g of water

Explanation:

Refer to this equation:

Q= mcΔt

Q= .545 J

c= 4.186 J/g

Δt= .892

plug in values:

.545 J = m(4.186 J/g)(.892°C)

simplify:

.545 J = m(3.734 J/g°C)

.146 g