A gas occupies a volume of 40 ml at 734.8 mm and 22* C . The gas was collected over water and the water level inside the eudiometer is the same as that outside. What is the volume of dry gas at S.T.P?

Answer 1

You need to use the combined formula: Pressure = P Volume = V Temperature = T

P1*V1/T1 = P2*V2/T2

then cross multiply