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)

half of the gram atomic. mass of oxygen

Answer 2

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