Question

The mass of oxygen gas which occupies $5.6$ litres at STP would be

• A. the gram atomic mass of oxygen
• B. one-fourth of the gram atomic mass of oxygen
• C. double the gram atomic mass of oxygen
• D. half of the gram atomic. mass of oxygen

Answer 1

Answer: (D)

22.4 L at STP = 32 g of oxygen
5.6 L at STP = $\frac{32}{22.4}\times 5.6=8$ g of oxygen
$=\frac{1}{2}\times$ Gram atomic mass of oxygen