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Phosphorus pentachloride decomposes according to the chemical equation PCI,(=PCI,() +C1,(@ K-1.80 at 250 °C A 0.3573 mol sample of PCI,() is injected into an empty 3.65 L reaction vessel held at 250 °C. Calculate the concentrations of PCI;(&) and PCI, () at equilibrium. [PCI) - M IPCI, - M

Carbon disulfide is prepared by heating sulfur and charcoal. The chemical equation is S, (g)+C(s) = CS, Ke - 9.40 at 900 K How many grams of CSⓇ can be prepared by heating 13.3 mol S, (a) with excess carbon in a 6.15 L reaction vessel held at 900 K until equilibrium is attained? mass of CS,®): 8