JEE Main 2022 Chemistry question
At 300 K, a sample of 3.0 g of gas A occupies the same volume as 0.2 g of hydrogen at 200 K at the same pressure. The molar mass of gas A is g . (nearest integer) Assume that the behaviour of gases as ideal. (Given: The molar mass of hydrogen gas is 2.0 g ).
Answer: 45
Solution
With at the same pressure: (0.2/2)R(200)/P = (3.0/M)R(300)/P, so 20 = 900/M and M = 45 g .