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:Which of the following gases has the lowest rate of…The mass of water vapour in a given volume of air is…What is the relative molecular mass of a compound…A given volume of methane diffuses in 20s. How long…9.60 g of a gas X occupies the same volume at 0.30 g…