Find the volume

Question

The volume of a gas has held at a constant temperature varies inversily with pressure of the gas if the volume of a gas is 1000 cubic centimeters when the pressure is 200 millimeters of mercury what its’s the volume when the pressure is 400 millimeters of mercury

Answer 1

P₁V₁ = P₂V₂ ⇒

V₂ = P₁V₁ / P₂

You have the values for P₁, V₁, and P₂. Plug them into the equation above for V₂, and get V₂ in units of cm³.