Question

A gas has a pressure of 300 torr, a temperature of 400 K,

and a volume of 50.0 milliliters. What volume will the gas have at a pressure of 150 torr and a temperature of 200 K?

Answer 1

P1 = 300 torr

V1 = 50 mL

P2 = 150 torr

V2 = ?

applying Boyle's Law

P1 * V1 = P2 * V2

300 torr * 50 mL = 150 torr * V2

V2 = 300 torr * 50 mL / 150 torr

V2 = 100 mL