Question

At 80°C, Kc = 1.87 10-3 for the following reaction

At 80°C, Kc = 1.87 10-3 for the following reaction.
PH3BCl3(s) reverse reaction arrow PH3(g) + BCl3(g)
(a) Calculate the equilibrium concentrations of PH3 and BCl3 if a solid sample of PH3BCl3 is placed in a closed vessel and decomposes until equilibrium isreached.
[PH3]
[BCl3]
(b) If the flask has a volume of 0.400 L, what is the minimum mass of PH3BCl3(s) that must be added to the flask in order to achieve equilibrium?

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