Question

A sample of ammonia (NH₃), a colorless gas with a pungent odor, occupies a volume of 2.00 L at a pressure of 645 mm Hg and a temperature of 25°C. What volume, in liters, will this NH₃ sample occupy at the same temperature if the pressure is increased to 725 mm Hg?

Answer 1

$P_1V_1=P_2V_2$ Since temperature is constant

$V_2=\frac{P_1V_1}{P_2}=\frac{2.00×645}{725}=1.78litres$