Question

A sealed 2 L reaction vessel initially contains 1.50 x 10-2

mol of water vapor and 1.50 x

10-2

mol of CO. After the following reaction

H2O(g) + CO(g) H2(g) + CO2(g)

has come to equilibrium, the vessel contains 8.3 x 10-3

mol of CO2. What is the

equilibrium concentration of CO?

A) 3.35 x 10-3

M

B) 6.70 x 10-3

M

C) 7.50 x 10-3

M

D) 8.30 x 10-3

M

E) 1.50 x 10-2

M