Consider the following reaction at equilibrium:2H2(s) + S2(s) ⇄ H2S (s) + heat In a 10.0-L...

Consider the following reaction at equilibrium:

2H2(s) + S2(s) ⇄ H2S (s) + heat

 In a 10.0-L container, an equilibrium mixture contains 2.02 g of H2, 10.3 g of S2, and 68.2 g of H2S.

a. What is the numerical value of Kc for this equilibrium mixture?

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b. If more H2 is added to the equilibrium mixture, how will the equilibrium shift?

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c. How will the equilibrium shift if the mixture is placed in a 5.00-L container with no change in temperature?

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d. If a 5.00-L container has an equilibrium mixture of 0.300 mol of H2 and 2.50 mol of H2S, what is the [S2 ] if temperature remains constant?

Calculate each of the following:

a. number of Ag atoms in 0.200 mol of Ag

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b. number of C3H8O molecules in 0.750 mol of C3H8O

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c. number of Cr atoms in 1.25 mol of Cr

Calculate each of the following:

a. number of Ni atoms in 3.4 mol of Ni

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b. number of Mg(OH)2 formula units in 1.20 mol of Mg(OH)2

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c. number of Li atoms in 4.5 mol of Li

a. How does a catalyst affect the activation energy?

b. Why is pure oxygen used in respiratory distress?

In the following reaction, what happens to the number of collisions when more Br2 (g) molecules are added?

H2(g) + Br2(g) → 2HBr(g)

In the following reaction, what happens to the number of collisions when the temperature of the reaction is decreased?

2H2(g) + CO(g) → CH3OH(g)

How would each of the following changes affect the rate of the reaction shown here?

2SO2(g) + O2(g) → 2SO3(g)

a. add some SO2(g)

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b. raise the temperature

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c. add a catalyst

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d. remove some O2(g)