Question

a gas occupies 100.0mL at a pressure of 780 mm hg . What is the volume of the gas when its pressure is increased to 880 mm hg

Answer 1

We can apply apply Boyle's law here, which state that for a fixed temperature and amount of gas, the volume of a gas is inversely proportional to the pressure. Thus,
PV = constant
780 x 100 = 880 x V
V = 88.6 ml