a. At a certain temperature, 0.740 mol SO30.740 mol SO3 is placed in a 4.00 L4.00 L container.

2SO3(g)2SO2(g)+O2(g)2SO3(g)2SO2(g)+O2(g)

At equilibrium, 0.120 mol O20.120 mol O2 is present. Calculate c.

b. A(aq)3B(aq)c=1.89106at 500 KA(aq)3B(aq)Kc=1.89106at 500 K

If a 3.50 M3.50 M sample of A is heated to 500 K500 K, what is the concentration of B at equilibrium?

c. Carbon disulfide is prepared by heating sulfur and charcoal. The chemical equation is

S2(g)+C(s)CS2(g)c=9.40 at 900 KS2(g)+C(s)CS2(g)Kc=9.40 at 900 K

How many grams of CS2(g)CS2(g) can be prepared by heating 12.9 mol S2(g)12.9 mol S2(g) with excess carbon in a 6.75 L6.75 L reaction vessel held at 900 K until equilibrium is attained?

d.

A 2.652.65 mol sample of NO2(g)NO2(g) is added to a 3.753.75 L vessel and heated to 100100 C.

N2O4(g)2NO2(g)c=0.360 at 100 CN2O4(g)2NO2(g)Kc=0.360 at 100 C

Calculate the concentrations of NO2(g)NO2(g) and N2O4(g)N2O4(g) at equilibrium.

[NO2]=[NO2]=