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3 years ago

How does the value of kc in n2o4(g)⇋2no2(g) kc=[no2]2[n2o4] depend on the starting concentrations of no2 and n2o4?

Chemistry

1 answer:

Vlad [161]3 years ago

8 0

<h3><u>Answer;</u></h3>

The value of Kc does not depend on starting concentrations.

<h3><u>Explanation;</u></h3>

<em><u>At constant temperature, changing the equilibrium concentration does not affect the equilibrium constant, because the rate constants are not affected by the concentration changes. </u></em>
When the concentration of one of the participants is changed, the concentration of the others vary in such a way as to maintain a constant value for the equilibrium constant.

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An acidic fog in pasadena was found to have a ph of 2.50. which expression represents this ph measurement?

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Supposing a temperature of 25 degrees and supposing that all activity coefficients are 1

pH = -log[H+]
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pH + pOH = 14
pOH = 14 - pH = 14 - 2.5 = 11.5
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3 years ago

Which of the following is true regarding the law of conservation of mass

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These are the answer options of this question and the comments about their validity:

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2H2(g) + O2 -> 2H2O

You start with 3 molecules, 2 molecules of H2 and 1 molecule of O2, and end with 2 molecules of water. Then the number of molecules of each side is different.

B) It dictates that the number of atoms of each element must be the same on both sides of a chemical equation.

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3 years ago

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3 years ago

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The initial pressure of a mixture of C6H6 and an excess of H2 in a rigid vessel is 1.21 atm. A catalyst is introduced. After the

KengaRu [80]

Answer:

mole fraction of C6H6 = 0.613 atm

Explanation:

The equation for this reaction is :

$C_6H_6 _{(g)} + 3H_2_{(g)} \to C_6H_{12}_{(g)}$

Initial P₁ P₂ 0

Final 0 P₂ -P₁/2 P₁

After completion of the reaction;

P₁ + P₂ = 1.21 atm ----- (1)

P₂ - P₁/2 + P₁ = 0.839 atm

P₂ + P₁/2 = 0.839 atm ----- (2)

Subtracting (2) from (1); we have:

P₁/2 = 0.371

P₁ = 0.742 atm

From(1)

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P₂ = 1.21 atm - 0.742 atm

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∴

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mole fraction of C6H6 = 0.742 atm / 1.21 atm

mole fraction of C6H6 = 0.613 atm

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