Question

Which one of the following gases contain the least number of molecukes ? (At Wt of `P = 32, Cl = 35.5, N = 14, O = 16, C = 12, H = 1)`.
A. 4.0g of laughing gas
B. 3.0g of Phosphine
C. 2.0 g of marsh gas
D. 10.0 g of Phosgene

Answer 1

Correct Answer - B
No. of molecules = No. of moles `xxN`