Hey there!:
ka = kw/ kb
Ka = 1.0*10⁻¹⁴ / 1.8* 10⁻⁵
Ka = 5.56*10⁻¹⁰
Now Cl⁻ is spectator ion
NH⁴⁺ ---> NH3 + H⁺
Kb = [NH⁴⁺ / [NH3] [H⁺]
at equilibrium the concentration of products is taken as x each and that of ammonium ion will be ( 0.10 -x )
5.56*10⁻¹⁰ = x² / [0.10 -x]
x = 7.54* 10⁻⁶ M
pH = - log [ H⁺ ]
pH = - log [ 7.54*10⁻⁶ ]
pH = 5.13
Answer C
Hope that helps!
The pH of a 0.10 M solution of NH4Cl is calculated using the Kb value of NH3 and the relationship between Ka, Kb, and Kw. By using the hydrolysis reaction equation and finding [H3O+], we can apply the formula pH = -log[H3O+] to get the pH value of 5.13.
Explanation:The pH of a 0.10 M NH4Cl solution can be determined using the Kb value of NH3 and the relationship between Ka, Kb, and Kw (ion product for water). Ammonium chloride, NH4Cl, will associate in water to form NH4+ and Cl-. The NH4+ ion reacts with water in a hydrolysis reaction: NH4+ + H2O ⇌ NH3 + H3O+. This reaction has a Ka (acid dissociation constant) that can be calculated from the Kb (base dissociation constant) of NH3, using the relationship Kw=Ka x Kb (Kw is the ion product for water, 1.0 x 10-14 at 25°C). Therefore, Ka = Kw/Kb = 1.0 x 10-14 / 1.8 x 10-5 = 5.56 x 10-10.
This is a weak acid equilibrium, use ICE table and solve for [H3O+] using the equation Ka = [NH3][H3O+] / [NH4+]. After calculating the [H3O+], we can find the pH using the formula pH = -log[H3O+]. The correct pH value will be close to values between 4 and 6, thus the answer is 5.13.
Learn more about pH Calculation here:https://brainly.com/question/34432529
#SPJ6
Which releases H+ cations when place in water?
A) CH_4
B) NaHC0_3
C) HCI
D) CO_2
C) [tex]\text{HCl}[/tex] hydrochloric acid and, in case that the question allows for more than one choices, D) [tex]\text{CO}_2[/tex] carbon dioxide as well.
Methane molecules [tex]\text{CH}_4[/tex] are nonpolar and barely dissolve in water.
Sodium hydrocarbonate [tex]\text{Na}\text{HCO}_3[/tex] undergoes hydrolysis to release hydroxide ions [tex]\text{OH}^{-}[/tex] that can end up consuming [tex]\text{H}^{+} \; (aq)[/tex]:
[tex]\text{NaHCO}_3 \; (aq) \to \text{Na}^{+} \; (aq) + \text{HCO}_3^{-} \; (aq)\\\text{HCO}_3^{-} \; (aq) + \text{H}_2\text{O} \; (l) \leftrightharpoons \text{H}_2\text{CO}_3\; (aq) + \text{OH}^{-} \; (aq)[/tex]
Hydrochloric acid, a strong acid, ionizes to produce protons [tex]\text{H}^{+} \; (aq)[/tex] and chloride ions when dissolved in water:
[tex]\text{HCl}\; (aq) \to \text{H}^{+} \; (aq) + \text{Cl}^{-} \; (aq)[/tex]
Carbon dioxide reacts with water to produce hydrocarbonic acid, a weak acid that slightly ionizes, also producing protons [tex]\text{H}^{+} \; (aq)[/tex] but to a significantly lesser extent than hydrochloric acid does.
[tex]\text{CO}_2\; (g) + \text{H}_2\text{O} \; (l) \leftrightharpoons \text{H}_2\text{CO}_3\; (aq)\\\text{H}_2\text{CO}_3\; (aq) \leftrightharpoons \text{H}^{+}\; (aq) + \text{HCO}_3^{-} \; (aq)[/tex]
D) Co2!
it reacts with water to form carbonic acid...
that has H+ ions!
The image shows the representation of an unknown element in the periodic table.
A square is shown. Inside the square ten is written at the top righthand side. To the middle left side, Symbol is written. Below it Name is written. And further below near the bottom edge of the square, twenty point one seven nine seven is written.
Based on the representation, which of the following statements about the element is true?
The total number of protons plus electrons is 10.
The number of neutrons in an atom of the element is 20.
The sum of the masses of protons and neutrons is 20.1797.
The mass of only the protons in the nucleus is 20.1797.
Answer:
the sum of the masses of protons and neutrons is 20.1797
Explanation:
The sum of the masses of protons and neutrons is 20.1797. The Option C.
What is the total mass of protons and neutrons?The total mass of protons and neutrons in an atom, known as the atomic mass or mass number can be determined by adding the individual masses of protons and neutrons.
In the given representation, the value "20.1797" likely represents the atomic mass of the element, which includes both protons and neutrons. This value corresponds to the sum of the masses of all the particles in the nucleus of the atom.
Read more about masses
brainly.com/question/86444
#SPJ4
Given a stock solution of 0.128 m bromide, solve for the bromide concentration obtained by diluting a 450 µl aliquot to the mark in a 25 ml volumetric flask.
Hey there!
Stock solution:
Concentracion bromide = 0.128 M
initial solution in volumetric flask = 450 µl
So , moles of bromide present:
450 µl in liters :
1 µl = = 1*10⁻⁶ liters
450 * ( 1*10⁻⁶ ) = 0.00045
0.128 * 0.00045 => 57.6 * 10⁻⁶ moles
Now volume final is 25 mL , in liters : 0.025 L ou 25*10⁻³
so new bromide concentration:
57.6*10⁻⁶ / 25*10⁻³=> 2.304*10⁻³ M
To find the bromide concentration in the diluted solution, use the formula for dilution C1V1 = C2V2. Your values are C1= 0.128 M, V1= 0.45 ml, and V2= 25 ml. Solve the equation for C2 to obtain the required bromide concentration.
Explanation:The bromide concentration in the diluted solution can be calculated using the formula for dilution: C1V1 = C2V2. Where C is concentration, V is volume, 1 refers to initial conditions, and 2 refers to conditions after dilution.
Here, C1 is 0.128 M (the initial concentration of bromide in the stock solution), V1 is 450 μl (the volume of the aliquot), V2 is 25 ml (the volume of the diluted solution in the volumetric flask). Inserting these values into the formula, we need to find C2 (unknown concentration of diluted solution).
Therefore, C2 = C1V1 / V2.
Before doing calculations, make sure that all volumes are in the same unit. In this case, convert μl to ml: 1μl = 0.001 ml, so 450 μl = 0.45 ml.
The calculation becomes: C2 = (0.128 M * 0.45 ml) / 25 ml, which, when calculated, provides the concentration of bromide in the diluted solution.
Learn more about Concentration calculation here:https://brainly.com/question/31862012
#SPJ2
Consider the reaction cl2(g) + i2(g) <=> 2 icl(g), which is endothermic as written. what would be the effect on the equilibrium position of removing cl2(g)? 1. reaction would go to the left, making more "reactants" 2. no change on the equilibrium position 3. reaction would go to the right, making more "reactants" 4. reaction would go to the left, making more "products" 5. reaction would go to the right, making more "products"
1. The position of equilibrium would shift to the left, making more reactants.
Cl₂(g) + I₂(g) + heat ⇌ 2ICl(g)
Le Châtelier’s Principle states that, if you add a stress to a system at equilibrium, the system will respond in a direction that will remove the stress.
Here, the stress is the removal of Cl₂. The system will respond by generating more Cl₂ to replace what was removed.
The position of equilibriumwill move to the left.
Removing Cl2(g) from the system would cause the equilibrium to shift to the left according to Le Chatelier's principle, resulting in the production of more reactants.
Removing Cl2(g) from the reaction Cl2(g) + I2(g) <=> 2 ICl(g), which is endothermic, would cause the equilibrium position to shift to the left. This is because according to Le Chatelier's principle, when a reactant is removed, the equilibrium shifts in the direction that replaces the removed substance, in this case, to the left to replenish the lost Cl2(g).
When considering the endothermic reaction Cl2(g) + I2(g) <=> 2 ICl(g), and analyzing the effect of removing Cl2(g) from the system, we apply Le Chatelier's principle. This principle states that if a change is imposed on a system at equilibrium, the system will adjust to counteract that change. In this case, removing Cl2(g) will result in the system shifting to the left to produce more reactants and re-establish equilibrium. Therefore, the correct answer is (1) the reaction would go to the left, making more "reactants".
What is the pH of 0.0050 M NH3 (Kb = 1.8 x 10-5)
11.70
2.30
3.52
10.48
Why are mixtures of gases, such as argon and helium, much more likely to form an ideal solution than other combinations such as solids and liquids?
A. Gases are more polar than liquid solvents.
B. When gases are mixed, the resulting solution has significantly different properties from the original components
C. The gases experience little or no interaction between molecules or atoms.
D. None of the above.
Mixtures of gases such as argon and helium are more likely to form an ideal solution because they experience insignificant intermolecular interactions, making their mixture thermally neutral with an increase in entropy. Option C is correct.
The intermolecular forces in ideal gases are considered to be nonexistent, and gases behave more ideally than solids or liquids. In an ideal solution, gases mix without any energy change due to similar intermolecular forces of attraction between the mixed gases as those present in the separated components.
This process is thermally neutral, and the formation of the gas solution results in increased disorder, or entropy, as gases like helium and argon will spread out and occupy a larger volume when mixed.
Hence, C. is the correct option.
Consider the equilibrium: HCOOH(aq) + F-(aq) <----> HCOO-(aq) + HF (aq) Given that the Ka of HCOOH = 1.8 x 10-4 and the Ka of HF = 6.8 x 10-4, calculate the equilibrium constant and predict whether the equilibrium favors reactants or products.
0.265; reactants
3.8 x 10-8; reactants
3.0 x 10-9; reactants
3.8; products
Hey there!:
K = Ka * Kb / Kw
Ka = 1.8*10⁻⁴
Kb = 10⁻¹⁴ / 6.8*10⁻⁴
K = 1.8*10⁻⁴ * ( 10⁻¹⁴/ 6.8*10⁻⁴ ) * ( 1 / 10⁻¹⁴ )
K = = 1.8 / 6.8
K = 0.265
Answer A
Therefore:
K is less than on the forward reaction is not favorable .
Hope That helps!
If 1.00 mol of argon is placed in a 0.500-L container at 20.0 ∘C , what is the difference between the ideal pressure (as predicted by the ideal gas law) and the real pressure (as predicted by the van der Waals equation)?
For argon, a=1.345(L2⋅atm)/mol2 and b=0.03219L/mol.
Hey There!
ideal gas law :
PV = nRT
P = nRT/V
P = (1*0.082)(18+273)/(0.5) = 47.724 atm
For VDW :
(P + a(n/V)²)(V - nB) = nRT
P = nRT/(V - nB) - a(n/V)²
P = 1*0.082*(18+273) / (0.5-1*0.03219) - 1.345*( 1/0.5 )² = 45.62
P = 45.62 atm
Pdif = P2-P1 = 47.724 - 45.62 = 2.104 atm
Final answer:
The difference between the ideal pressure and the real pressure of argon in the given conditions is found by using both the ideal gas law and the van der Waals equation, then subtracting the ideal pressure from the real pressure.
Explanation:
When comparing the ideal gas law with the van der Waals equation, we are looking at two different models for describing the behavior of gases. The ideal gas law assumes that gas particles do not interact and have no volume, while the van der Waals equation accounts for the finite volume of gas particles and the attractive forces between them, which can cause deviations from ideal behavior at high pressures and low volumes or high temperatures.
To find the ideal pressure, use the ideal gas law PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant (0.0821 L·atm/(K·mol)), and T is the temperature in Kelvin. Substituting the values into this equation, we can calculate the ideal pressure for argon.
The real pressure of argon can be estimated using the van der Waals equation, which is given by (P + n²a/V²)(V - nb) = nRT, with a and b being the van der Waals constants for argon. Subtracting the ideal pressure from the real pressure will give us the difference between the two.
Dehydration Synthesis
The following is a dehydration synthesis reaction. Which of the following correctly fills in the missing molecules?
C6H12O6 + C6H12O6 --> _______ + __________
A) H2O + C12H22O11
B) C6H12O6 + C12H22O11
C) C12H12 + H12O12
D) H2O + C12H24O12
Hey there!:
C6H12O6 + C6H12O6 ----> H2O + C12H22O11
it is a dehydration synthesis reaction, because H2O is released and C12H22O11 is formed .
Answer A
Hope that helps!
The process of dehydration synthesis combines two smaller molecules into a larger one, eliminating a molecule of water. In this case, two glucose molecules combine to create one sucrose molecule and water, thus the correct answer is A) H2O + C12H22O11.
Explanation:In the process of dehydration synthesis, two smaller molecules combine to create a larger molecule by eliminating one molecule of water. In the reaction given, two molecules of glucose (C6H12O6) undergo dehydration synthesis to produce a molecule of sucrose (C12H22O11) and water (H2O). Therefore, the correct answer for the missing molecules is A) H2O + C12H22O11.
Learn more about Dehydration Synthesis here:https://brainly.com/question/31871321
#SPJ2
I need help with my chemistry homework. SHOW WORK
1) The density of tin (Sn) is the 5.75 g/cm^3. How many cubic decimeters (dm^3) does 17.2 kg of Sn occupy?
2) If half a liter (500 mL) of olive oil weights 425g, what is its density?
3) The density of silver is 10.5 g/cm^3. What is the mass of 0.987 dm^3 of silver ?
1. 17.2kg=17200g
so knowing that d=m/V, use V=m/d to calculate the volume
v=17200/5.75
and then devide by 1000 to convert cm3 to dm3 and the answer will be in dm3
2. d=m/v
v=0.5l
m=425g
so use the formula and you will get d=425/0.5=850g/l
3. use d=m/v again, but not before rewriting the formula for volume: m=vd and convert dm3 to cm3
1dm3=1000cm3
so 0.987dm3 =987 cm3
now m=987cm3 * 10.5g/cm3 and the answer will be in grams
The volume occupied by 17.2 kg of tin is 2.99 cubic decimeters.
The density of olive oil is 0.850 g/mL.
The mass of 0.987 cubic decimeters of silver is 10,365.5 grams.
Explanation:
Given:
The density of tin is [tex]5.75 g/cm^3[/tex]A 500 mL of olive oil weighs 425 g.The density of silver [tex]10.5 g/cm^3[/tex]To find:
The volume in cubic decimeters of 17.2 kg of tin.The density of olive oil.Mass of [tex]0.987 dm^3[/tex] of silverSolution:
1.
The mass of tin = m = 17.2 kg
[tex]1 kg = 1000 g\\m=17.2 kg=17.2\times 1000 g=17,200 g[/tex]
The volume of tin = v
The density of tin = d = [tex]5.75 g/cm^3[/tex]
[tex]d=\frac{m}{v}\\\\5.75g/cm^3=\frac{17,200 g}{v}\\\\v=\frac{17,200 g}{5.75g/cm^3}=2,991.3 cm^3\\\\1 cm^3= 0.001 dm^3\\\\v=2,991.3 cm^3=2,991.3\times 0.001 dm^3\\\\=2.9913 dm^3\approx 2.99 dm^3[/tex]
The volume occupied by 17.2 kg of tin is 2.99 cubic decimeters.
2.
The mass of an olive oil = m = 425 g
The volume of an olive oil = v = 500 mL
The density of an olive oil =d
[tex]d=\frac{m}{v}\\=\frac{425 g}{500 mL}=0.850 g/mL[/tex]
The density of olive oil is 0.850 g/mL.
3.
The mass of silver = m =
The volume of silver = v = [tex]0.987 dm^3[/tex]
[tex]1 dm^3=1000 cm^3\\v=0.987 cm^3=0.987\times 1000=987 cm^3[/tex]
The density of silver = d =[tex]10.5 g/cm^3[/tex]
[tex]d=\frac{m}{v}\\\\10.5 g/cm^3=\frac{m}{987 cm^3}\\\\m=10.5 g/cm^3\times 987 cm^3=10,365.5 g[/tex]
The mass of 0.987 cubic decimeters of silver is 10,365.5 grams.
Learn more about density here:
brainly.com/question/952755?referrer=searchResults
brainly.com/question/14373997?referrer=searchResults
A sample of 0.6760 g of an unknown compound containing barium ions (ba2+) is dissolved in water and treated with an excess of na2so4. if the mass of the baso4 precipitate formed is 0.4105 g, what is the percent by mass of ba in the original unknown compound?
Answer: 35.72 % of Barium ions will be present in the original unknown compound.
Explanation: The reaction of Barium ions and sodium sulfate is:
[tex]Na_2SO_4(aq.)+Ba^{2+}(aq.)\rightarrow BaSO_4(s)+2Na^+(aq.)[/tex]
Here, Sodium sulfate is present in excess, Barium ions are the limiting reagent because it limits the formation of product.
Now, 1 mole of barium sulfate is produced by 1 mole of Barium ions.
Molar mass of Barium sulfate = 233.38 g/mol
Molar mass of Barium ions = 137.327 g/mol
233.38 g/mol of barium sulfate will be produced by 137.323 g/mol of Barium ions, so
0.4105 grams of barium sulfate will be produced by = [tex]\frac{137.327g/mol}{233.38g/mol}\times 0.4105g[/tex] of Barium ions
Mass of barium ions = 0.2415 grams
To calculate percentage by mass, we use the formula:
[tex]\% mass=\frac{\text{Mass of solute (in grams)}}{\text{Total mass of the solution(in grams)}}\times 100[/tex]
Mass of the solution = 0.6760 grams
Putting the value in above equation, we get
[tex]\% \text{ mass of }Ba^{2+}\text{ ions}=\frac{0.2415g}{0.6760g}\times 100[/tex]
% mass of Barium ions = 35.72%.
The percentage by mass of barium ion (Ba²⁺) in the unknown compound is 35.7%
We'll begin by writing the balanced equation for the reaction. This is given below:
Ba²⁺(aq) + Na₂SO₄(aq) —> BaSO₄(s) + 2Na⁺(aq)
Molar mass of Ba²⁺ = 137 g/mol
Mass of Ba²⁺ from the balanced equation = 1 × 137 = 137 g
Molar mass of BaSO₄ = 137 + 32 + (16×4)
= 233 g/mol
Mass of BaSO₄ from the balanced equation = 1 × 233 = 233 g
Thus,
From the balanced equation above,
137 g of Ba²⁺ reacted to produce 233 g of BaSO₄.
Next, we shall determine the mass of Ba²⁺ that reacted to produce 0.4105 g of BaSO₄. This can be obtained as follow:
From the balanced equation above,
137 g of Ba²⁺ reacted to produce 233 g of BaSO₄.
Therefore,
X g of Ba²⁺ will react to produce 0.4105 g of BaSO₄ i.e
X g of Ba²⁺ = [tex]\frac{137 * 0.4105}{233} \\\\[/tex]
X g of Ba²⁺ = 0.2414 g
Finally, we shall determine the percentage of Ba²⁺ in the unknown compound. This can be obtained as follow:
Mass of Ba²⁺ = 0.2414 g
Mass of compound = 0.6760 g
Percentage of Ba²⁺ =?[tex]Percentage = \frac{mass of ion}{mass of compound} * 100\\\\= \frac{0.2414}{0.6760} * 100\\\\[/tex]
Percentage of Ba²⁺ = 35.7%Therefore, the percentage by mass of barium ion (Ba²⁺) in the unknown compound is 35.7%
https://brainly.com/question/15310350
who suggested the Billiard Bill model and what were his conclusions about the structure of an atom?
Answer:
John Dalton.The atom is indestructible and indivisible; the atoms of a same element are all identical, and the atoms of different elements are different.Explanation:
Billiard Ball Model is the name used for the model of the atom proposed by John Dalton (1766 - 1844)
The use of this name is to refer the fact that the atom was depicted as a tiny solid and indivisible particles.
Dalton's conclusions about the structue of the atom and the matter were:
Calculate the heat of the reaction using average bond dissociation energies
CH₄ + 2O₂ ⇒ CO₂ + 2H₂O
I really don't understand this college chemistry question. It's due tonight! Thank you to anyone who can explain and answer.
[tex]\Delta E = 808 \; \text{kJ} \cdot \text{mol}^{-1}[/tex]
ExplanationForming chemical bonds releases energy whereas breaking them requires an input of energy.
Typical chemical reaction involves breaking preexisting bonds and forming new ones. The amount of energy absorbed in the first process is not necessarily equal to the energy released in the second. Depending on the relationship between the two energies, their difference is either released or absorbed in the chemical reaction.
Start by identifying bonds broken and formed in this chemical process:
[tex]\phantom{\text{H}-}\;\;\text{H}\\\phantom{\text{H}-}\;\;\;|\\\text{H}-\text{C}-\text{H} + 2 \; \text{O}-\text{O} \to \text{O}=\text{C}=\text{O} + 2\; \text{H}-\text{O}-\text{H}\\\phantom{\text{H}-}\;\;\;|\\\phantom{\text{H}-}\;\;\text{H}[/tex]
Bonds Broken per reaction:
Four carbon-hydrogen single bonds [tex]\text{C}-\text{H}[/tex] as in one methane [tex]\text{CH}_4[/tex] molecule;Two oxygen-oxygen bonds [tex]\text{O}=\text{O}[/tex] as in two oxygen [tex]\text{O}_2[/tex] molecules with one bond in each molecule.Bonds Formed per reaction:
Two carbon-oxygen double bonds[tex]\text{C}=\text{O}[/tex] as in one carbon dioxide [tex]\text{CO}_2[/tex] molecule.Four hydrogen-oxygen single bonds [tex]\text{H}-\text{O}[/tex] as in two water [tex]\text{H}_2\text{O}[/tex] molecules.[tex]\text{Energy Change} = \text{Energy Released} - \text{Energy Absorbed}\\\phantom{\text{Energy Change}} = E[\text{Bonds Formed}] - E[\text{Bonds Broken}][/tex]
Referring to a thermodynamic data table of bond energies,
[tex]E[\text{C}-\text{H}] = 414 \; \text{kJ} \cdot \text{mol}^{-1}[/tex];[tex]E[\text{O}=\text{O}] =498 \; \text{kJ} \cdot \text{mol}^{-1}[/tex];[tex]E[\text{C}=\text{O}] =804 \; \text{kJ} \cdot \text{mol}^{-1}[/tex];[tex]E[\text{H}-\text{O}] =463 \; \text{kJ} \cdot \text{mol}^{-1}[/tex].Note that due to the conservation of energy, the energy required to break a chemical bond shall be the same as the energy released on its formation.
[tex]\text{Energy Change} =(2 \times 804 + 4 \times 463) - (4 \times 414 + 2 \times 498)\\\phantom{\text{Energy Change}} =3460 - 2652\\\phantom{\text{Energy Change}} = 808 \; \text{kJ} \cdot \text{mol}^{-1}[/tex]
3460 kJ, the energy released in the formation of bonds is greater than 2652 kJ, the energy absorbed to break bonds in the reactant. The energy change is thus positive and 808 kJ of energy is released per mole reaction.
(scientific investigations) help please.
I agree with what you've chosen for question two and three.
I would choose C for the fourth question and argue that you shall also go with C for question five.
One of the main ideas about repetition is to have multiple Trials- or independent experiments- for a single independent variable using identical experimental setup. The table presented in option C is the only one among the four choices that allots spaces for measurements from multiple independent experiments.
Hypotheses are predictions of the outcome of a particular experiment. A hypothesis is correct only if it accurately describes the outcome of an experiment. The hypothesis, not the data, would have to be revised if the two doesn't fit. The researcher could keep developing and testing new hypotheses until arriving at a correct one.
Additionally, I would prefer option B over option D in the first question- responses to that question can depends on what your teacher says about the validity of different sources, given that neither B nor D are reliable as sources that one would like to cite in a paper.
I need help with my chemistry homework. SHOW WORK
1) The density of tin (Sn) is the 5.75 g/cm^3. How many cubic decimeters (dm^3) does 17.2 kg of Sn occupy?
2) If half a liter (500 mL) of olive oil weights 425g, what is its density?
3) The density of silver is 10.5 g/cm^3. What is the mass of 0.987 dm^3 of silver ?
1) The gold will occupy a volume of 2.99 dm³.
[tex]\text{Volume = 17 200 g} \times \frac{\text{1 cm}^{3}}{\text{5.75 g}} = \text{2990 cm}^{3} = \textbf{2.99 dm}^{3}\\[/tex]
2) The density of the olive oil is 0.850 g/cm³.
[tex]\text{Density} = \frac{\text{mass}}{\text{volume}} = \frac{\text{425 g}}{\text{500 cm}^{3}}= \textbf{0.850 g/cm}^{3}[/tex]
3) The mass of the silver is 10.4 kg.
[tex]\text{Mass} = \text{987 cm}^{3} \times \frac{\text{10.5 g} }{\text{1 cm}^{3 }} = \textbf{10 400 g = 10.4 kg}\\[/tex]
Calculate the volume of liquid in the round flask sketched below. give your answer in liters, and round to the nearest 0.01l .
Hey There!
Assuming the part of the round flask containing liquid to be perfect sphere, we can calculate it's volume.
Given diameter of sphere = 24 cm
Therefore radius of the sphere, r= 24/2= 12 cm
Volume of the sphere of diameter 24 cm = (4/3)*pi*r³ = 7,238.23 cm3
Conversion of cm³ to L
1 L= 1 dm³
1 dm = 10 cm
Therefore 1L= 1 dm³ = 1000 cm³
So the volume of liquid in the round flask = 7.24 L( round of to nearest 0.01 L)
The volume of a round flask can be calculated using the formula: Volume = 4/3 * π * radius³. The calculated volume should then be converted from cubic meters to liters, and rounded to the nearest 0.01 liters.
The volume of a round flask or sphere can be calculated using the mathematical formula: Volume = 4/3 * π * radius³. Assuming you have the radius of the flask, you plug it into this formula, calculate the volume in cubic meters, and then convert to liters (since 1 cubic meter equals 1000 liters). If you are given the diameter, remember to divide it by 2 to find the radius. Once you have your answer, round to the nearest 0.01 liters as per the question's instructions.
Learn more about Volume Calculation here:https://brainly.com/question/32822827
#SPJ2
What is the pH of 0.10 M NaF(aq). The Ka of HF is 6.8 x 10-4
2.08
8.08
5.92
14.92
Given information:
Concentration of NaF = 0.10 M
Ka of HF = 6.8*10⁻⁴
To determine:
pH of 0.1 M NaF
Explanation:
NaF (aq) ↔ Na+ (aq) + F-(aq)
[Na+] = [F-] = 0.10 M
F- will then react with water in the solution as follows:
F- + H2O ↔ HF + OH-
Kb = [OH-][HF]/[F-]
Kw/Ka = [OH-][HF]/[F-]
At equilibrium: [OH-]=[HF] = x and [F-] = 0.1 - x
10⁻¹⁴/6.8*10⁻⁴ = x²/0.1-x
x = [OH-] = 1.21*10⁻⁶ M
pOH = -log[OH-] = -log[1.21*10⁻⁶] = 5.92
pH = 14 - pOH = 14-5.92 = 8.08
Ans: (b)
pH of 0.10 M NaF is 8.08
Meteorology is best defined as the study of
Meteorology is the study of the atmosphere and atmospheric phenomena, focusing on predicting the weather in the short term to protect lives and property. This scientific field uses various data and modeling techniques to forecast weather patterns and is closely related to climatology and atmospheric science.
Meteorology is defined as the study of the atmosphere and the various phenomena within it, including the processes that cause weather conditions. Specifically, meteorologists analyze the movement of air masses, cloud formation, and precipitation, all of which play a central role in shaping our day-to-day weather.
The goal of meteorology is not only to understand these atmospheric processes but also to predict weather patterns and changes. This predictive ability is crucial for safeguarding lives, property, and economic activities that may be affected by weather events. Meteorology utilizes data from air pressure and temperature measurements, among others, and employs modeling techniques to produce weather forecasts.
It is a discipline that significantly overlaps with other branches of atmospheric science, such as climatology and atmospheric chemistry. While climatology focuses on longer-term weather patterns and trends over decades or even centuries, meteorology primarily deals with the short-term prediction of weather. These weather predictions, enabled by the advances in measurement and analysis technologies such as radars and satellites, play a vital role in daily life and in preparing for extreme weather events.
How can heat be used to determine if a mineral is metallic in nature?
Metals conduct heat from one to another end.....this property will help you
Heat is used to measure a mineral's thermal conductivity and specific heat to determine its metallic nature. By comparing these values with known metallic minerals and observing properties like color and luster, one can identify if a mineral is metallic.
Heat can be utilized to determine if a mineral has a metallic nature by examining its thermal conductivity and specific heat. Metallic minerals generally conduct heat more efficiently than non-metallic minerals due to the movement of free electrons. To quantify this, the specific heat of a mineral could be measured by transferring a known quantity of heat to the mineral and observing the change in its temperature.
For example, consider a scenario where a piece of metal at a known temperature is placed in water at a different temperature. By measuring the resulting temperature change in the water, and knowing the mass and specific heat of the water, the specific heat of the metal can be calculated. This value can then be compared against known values for metallic minerals to help identify the mineral in question.
If the measured specific heat is close to known values for metals such as gold or lead, additional observations such as color and luster can help refine the identification. For instance, a silver/gray color, when paired with an appropriate specific heat value, suggests a lead mineral over gold, which has a yellowish color.
Find the number of moles of water that can be formed if you have 178
mol of hydrogen gas and 84 mol of oxygen gas. Please give an explanation why. Thanks!
Answer:- 168 moles of water are formed.
Solution:- The balanced equation for the formation of water from hydrogen and oxygen gases is:
[tex]2H_2(g)+O_2(g)\rightarrow 2H_2O(l)[/tex]
From this equation hydrogen and oxygen react in 2:1 mol ratio.
We have been given with 178 moles of hydrogen and 84 moles of oxygen. We need to figure out the limiting reactant first. For this let's either calculate the moles of oxygen required to react completely with 178 moles of hydrogen or the moles of hydrogen required to react completely with 84 moles of oxygen.
Let's say we calculate the moles of oxygen required to react completely with 178 moles of hydrogen:
[tex]178molH_2(\frac{1molO_2}{2molH_2})[/tex]
= [tex]89molO_2[/tex]
From the above calculations, 89 moles of oxygen are required to react completely with 178 moles of hydrogen but only 84 moles of oxygen are available, It means oxygen is the limiting reactant and the product yield depends on it.
There is 1:2 mol ratio between oxygen and water. Let's calculate the moles of water for given 84 moles of oxygen:
[tex]84molO_2(\frac{2molH_2O}{1molO_2})[/tex]
= [tex]168molH_2O[/tex]
So, the reaction of 178 moles of hydrogen and 84 moles of oxygen gives 168 moles of water.
Final answer:
To determine the number of moles of water that can be formed from 178 mol of hydrogen gas and 84 mol of oxygen gas, the balanced chemical equation 2 H₂ + O₂ → 2 H₂O is used. Oxygen is the limiting reactant with only 84 mol available, resulting in the production of 168 moles of water.
Explanation:
To find the number of moles of water that can be formed from 178 mol of hydrogen gas (H₂) and 84 mol of oxygen gas (O₂), we need to use the balanced chemical equation for the formation of water:
2 H₂(g) + O₂(g) → 2 H₂O(g)
According to this equation, 2 moles of H₂ react with 1 mole of O₂ to produce 2 moles of H₂O. The limiting reactant is the one that will run out first and determine the amount of the product formed. With 178 mol of hydrogen available, we would need 89 mol of oxygen to fully react with all the hydrogen (since the ratio is 2:1). However, since we only have 84 mol of oxygen, oxygen is the limiting reactant.
We can calculate the moles of water produced as follows:
84 mol O₂ (2 mol H₂O / 1 mol O₂) = 168 mol H₂O
Therefore, 168 moles of water can be formed from 178 mol of hydrogen gas and 84 mol of oxygen gas.
Will mark brainliest!!!!!
Please help I don't understand this.
If the density of an object is affected by its mass, then ____________will have the highest density and
___________will have the lowest density
If the density of an object is affected by its mass, then osmium will have the highest density and hydrogen will have the lowest density
Density = mass/volume or D = m/V
If we hold V constant, we can write D = km. where k = 1/V.
Thus, D ∝ m. As the mass of a fixed volume of a substance increases, the density increases.
The mass of H₂ in 1 cm³ 0.080 g. The mass of Os in 1 cm³ is 22.6 g.
However, there are substances with even higher densities. For example, the material at the centre of a neutron star is so dense that 1 cm³ of the material has a mass of 10¹² kg!
A student has a piece of aluminum metal. Which is the most reasonable assumption the student could make about the metal?
A.
It would only conduct electricity if it were melted.
B.
It could melt and boil if thrown into a campfire.
C.
It would break if it were hit with a hammer.
D.
It will always have the exact same shape.
E.
It could be stretched into a thin wire.
The metals are elements which have low ionization potential and can lose electrons easily
the other physical characteristics associated with them and hence with Aluminium are
a) they can conduct electricity in molten state, hence It would only conduct electricity if it were melted.
b) It could be stretched into a thin wire. It means it is ductile.
In case of given aluminium metal the correct answer is
it could be stretched to thin wire
(E) It could be stretched into a thin wire.
- Aluminum is a ductile metal, meaning it can be stretched into thin wires without breaking.
- Let's analyze each option to see why (E) is the most reasonable assumption:
- (A) Aluminum conducts electricity well even in its solid state, not just when melted, so this assumption is not accurate.
- (B) Aluminum has a high melting point (660.32°C or 1220.58°F), much higher than typical campfire temperatures, so it would not melt or boil if thrown into a campfire.
- (C) Aluminum is malleable and ductile, meaning it can be hammered into different shapes without breaking easily.
- (D) Aluminum can maintain its shape under normal conditions, but it can be reshaped.
- (E) Aluminum is known for its ability to be drawn into thin wires, which is a characteristic of ductile metals.
Therefore, option (E) is the most reasonable assumption about aluminum metal among the given choices.
Which of the following statements is correct
A.) Blue litmus paper turns red when placed in a base
B.) Blue litmus paper stays blue when placed in a acid
C.) Red litmus paper stays red when placed in a base
D.) Red litmus paper turns blue when placed in a base
answer D)
explanation:
Bases turn the red litmus to Blue
while aciDs turn blue litmus to reD.
Answer: The correct answer is Option d.
Explanation:
Litmus paper is defined as the indicator which is used to determine the nature of the solution, whether it is acidic or basic.
There are 2 types of litmus paper:
Red litmus paper: This paper will turn blue if it is dipped in basic solution and it remains as such if it is dipped in acidic solution.Blue litmus paper: This paper will turn red if it is dipped in acidic solution and remains as such if it is dipped in basic solution.Hence, the correct answer is Option d.
The pH of 0.10 M solution of an acid is 6. What is the percentage ionization of the acid?
6.0 %
0.00010%
10%
0.0010%
Hey there!:
HA <=> H⁺ + A⁻
pH = -log[H+] = 6
[ H⁺ ] = 10^-pH
[ H⁺] = 10 ^ -6
[ H⁺ ] = 0.000001 M
Percent dissociation:
[ H⁺ ] / [ HA]o * 100
[ 0.000001 / 0.10 ] * 100
0.00001 * 100 => 0.0010%
Answer D
Hope that helps!
a roller coaster car moving along a track is energy conserved in this system
Yes- as long as the roller coaster car is not powered once it leaves the station and energy loss due to resistance can be ignored.
Energies of a system:
Potential EnergyKinetic EnergyThe term "Mechanical Energy" refers to the sum of both types of energy.A roller coaster car moving along a level track with an initial velocity has mechanical energy in the form of kinetic energy.
The car would slow down while gaining height as its kinetic energy converts to gravitational potential energy when moving upwards along the track. It would have no kinetic energy since all its mechanical energy are now in the form of gravitational potential energy in case it comes to a stop before reaching the top of the track.
Similarly, the car gains speed while losing height as some of its gravitational energy is converted to kinetic energy when it travels downwards.
The mechanical energy of this vehicle conserves since any of the movements, moving upslope, downslope, or level, would ensure that
Loss in Potential Energy = Gain in Kinetic Energy
and vice versa.
Final answer:
Energy is conserved in a roller coaster system when ignoring friction and air resistance. The total mechanical energy remains constant as potential energy is converted to kinetic energy and vice versa throughout the ride.
Explanation:
Yes, energy is conserved in the system of a roller coaster car moving along a track, provided that we neglect any losses due to friction or air resistance. According to the law of conservation of energy, the total mechanical energy of a closed system remains constant. This is represented by the equation E = T + U, where E stands for the total mechanical energy, T is the kinetic energy, and U is the potential energy.
At the top of the first hill, the roller coaster car has its maximum potential energy, which is then converted to kinetic energy as it descends. The conversions between potential and kinetic energy continue throughout the ride, with energy transitioning as the car goes up and down the track. At the bottom of each descent, the car reaches its maximum kinetic energy, which becomes potential energy again as the car rises.
The total mechanical energy at any point in the ride should be the same as it was at the start of the coaster's trip, assuming no energy is lost. Remember that both kinetic and potential energies are forms of mechanical energy and are measured in joules, indicating the capacity for doing work.
The electron configuration represents an element in what category?
A) noble gas
B) Group A elements
C) transition metals
D) inner transition metals
1s22s22p63s23p64s23d1
What is the volume of 1.0 mole of hydrogen gas at standard temperature and pressure?
A) 5.5 L
B) 11 L
C) 22 L
D) 44 L
Answer:
C. transition metals
Explanation:
Answer:
c
Explanation:
i did it on usatp
Which of the following is the science of naming living things according to common characteristics? A) taxonomy Eliminate B) classification C) phylogeny D) taxon
Answer: A) Taxonomy
Taxonomy is the science of naming groups of living organism based on common characteristics
The answer is A.
Taxonomy is the science of naming living things according to common characteristics.It is also the science of grouping organisms according to their characteristics and evolutionary history.
Put the elements in order from lowest (1) to highest (6) electronegativity.
aluminum
barium
copper
fluoride
phosphorus
francium
The order of the electronegativity for the given elements is:
Fluorine > Phosphorous > Copper > Aluminium > Barium > Francium
What is electronegativity?Electronegativity measures the tendency of an element to attract electrons of bonded pairs towards itself. The value of electronegativity of an atom is with respect to another bonded atom.
When two atoms are bonded with each other through a bond and one of them is more electronegative than another bonded atom. Then the electron density of the bond will lie closer to the more electronegative atom.
Firstly, Fluorine is the most electronegative element in the modern periodic table. Aluminium and phosphorous are both present in the 2nd period. As we know, the electronegativity increases as we move from left to right in the periodic table.
Therefore phosphorous is more electronegative than aluminium. Copper is more electronegative than aluminium as the value of the electronegativity for copper is 1.92 and for aluminium is 1.6.
Barium and Francium lie at the bottom of the periodic table, Therefore they are the least electronegative. But the electronegativity of the Braium is more than that of Francium.
Learn more about electronegativity, here:
https://brainly.com/question/17762711
#SPJ2
What is the molarity of 70.6 g C2H6O in 2.25 L of solution
Hey there!
Molar mass C2H6O = 46.0684 g/mol
Number of moles:
n = mass of solute / molar mass
n = 70.6 / 46.0684
n = 1.532 moles
Therefore:
M = number of moles / volume ( L )
M = 1.532 / 2.25
= 0.680 M
Hope that helps!
The molarity of a solution containing 70.6 g of C2H6O in 2.25 L of solution is calculated by determining the number of moles of C2H6O and dividing by the volume in liters, resulting in a molarity of 0.6818 M.
Explanation:The molarity of a solution is calculated by dividing the number of moles of solute by the volume of the solution in liters. First, you need to find the molar mass of C2H6O, which is (2 × 12.01) + (6 × 1.008) + (1 × 16.00) = 46.07 g/mol. Next, calculate the number of moles of C2H6O in 70.6 g by using the molar mass:
Number of moles = 70.6 g / 46.07 g/mol = 1.534 moles (approximately)Then, divide the number of moles by the volume of the solution in liters to find the molarity:
Molarity = 1.534 moles / 2.25 L = 0.6818 MTherefore, the molarity of the solution is 0.6818 M.
Learn more about molarity here:https://brainly.com/question/8732513
#SPJ2
please help fast
Rock sediments are carried to other places by the wind, running water, and gravity. As these forces lose energy settling takes place. The sediments settle out of the air or water in rock particles graded by size with heavier pieces settle out first. Which term of describes this process of sedimentary rock formation. A: Deposition B:litthification. C:physical weathering. D: Chemical weathering
A) deposition is the processes where particles of rock or laid down in sections with heavier sediments building up first
Answer:
The correct answer is option A, that is, deposition.
Explanation:
The erosion, weathering, and deposition refer to the procedures, which works spontaneously on or close to the surface of the Earth. With time, these procedures lead to the generation of sedimentary rocks.
Deposition refers to the procedure where the rocks particles are laid down in segments with the heavier sediments forming up initially. It is the geological phenomenon in which the soil, sediments, and rocks are supplemented to a land mass or landform. Water, ice, wind, and gravity carry the previously weathered surface material that at the expense of adequate kinetic energy in the fluid gets deposited, forming up the sediment layers.