A 0.312 mol sample of an unknown gas contained in a 8.00 L flask is found to have a density of 1.78 g/L. The molecular weight of the unknown gas is ?? g/mol.

Answer 1

1. 1.78 g/L X 8 L=14.24 g
2. 14.24 g / 0.312 mol= 45.64 g/mol