Question

2. If a sample of helium gas has a volume of 120 mL and a pressure of 850 mm Hg, what is the new

volume if the pressure is changed to 425 mm Hg ?

Answer 1

P₁V₁ = P₂V₂

V₂ = P₁V₁ / P₂

V₂ = (120 mL *  850 mm Hg) / 425 mm Hg = 240 mL