Question

A container contains 3.2 g of O2 gas. The volume of the gas at STP is
A. 2.24L
B. 224.0L
C. 0.224L
D. None

Answer 1

3.2 g = ?mols O2.
mols O2 = 3.2/molar mass O2 = ?
Then you know that 1 mol of a gas occupies 22.4 L at STP