Phosphorus pentachloride decomposes according to the chemical equation PC1, (g) PC13 (g) + Cl₂(g) Ke = 1.80 at 250 °C A 0.2293 mol sample of PC1, (g) is injected into an empty 3.15 L reaction vessel held at 250 °C. Calculate the concentrations of PC1, (g) and PC13 (g) at equilibrium. [PCI, ] = [PC1₂] = M M

Sulfur dioxide and oxygen react to form sulfur trioxide, like this: 2 SO₂(g) + O₂(g) → 2 SO3(g) Also, a chemist finds that at a certain temperature the equilibrium mixture of sulfur dioxide, oxygen, and sulfur trioxide has the following composition: compound concentration at equilibrium SO₂ 0.78 M 0₂ SO 3 0.41 M K = [] 0.72 M Calculate the value of the equilibrium constant K for this reaction. Round your answer to 2 significant digits.

At a certain temperature, the equilibrium constant K for the following reaction is 3.44 x 10°: NO, (g) + CO(g)= NO(g) + CO,(g) Use this information to complete the following table. Suppose a 50. L reaction vessel is filled with 0.81 mol of NO2 and 0.81 mol of CO. What can you say about the composition of the mixture in the vessel at equilibrium? O There will be very little NO2 and CO. x10 There will be very little NO and CO2. ? Neither of the above is true. What is the equilibrium constant for the following reaction? Round your answer to 3 significant digits. K =0 NO(g)+CO2(9) NO2(9)+CO(9) What is the equilibrium constant for the following reaction? Round your answer to 3 significant digits. = 0 K = 2 NO,(9)+2CO(9) 2 NO(9)+2CO2(9)

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