A gas X diffuse through porous partition at the rate of 3cm³ per second. Under the same condition hydrogen diffused at the rate of 15cm³ per second. What is the relative molecular mass of X? by Sunday | Apr 21 | Chemistry NECO | 0 comments A. 5 B. 12 C. 18 D. 45 E. 50 Correct Answer: Option E – 50 Users Also Read These:Propane carbon(IV)oxide diffuse at the same rate…The mass of water vapour in a given volume of air is…The volume occupied by 1.58g of a gas at S.T.P is…What is the relative molecular mass of a compound…The mass of water vapour in a given volume of air is…