posted by Noodle .
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?
You need to use the combined formula: Pressure = P Volume = V Temperature = T
P1*V1/T1 = P2*V2/T2
then cross multiply