In the reaction A(g) -> 2 B(g) + C(g), the total pressure increases while the partial pressure of A(g) decreases. If the initial pressure of A(g) in a vessel of constant volume is 1.000 x 10^3 mmHg,
a) What will be the total pressure when the reaction has gone to completion?
b) what will be the total gas pressure when the partial pressure of A(g) has fallen to 8.00x10^2 mmHg?