Question

What is the volume occupied by 4 grams of ethylene at $STP$ (in litres)?

• A. 22.4
• B. 11.2
• C. 5.6
• D. 3.2

Answer 1

Answer: (D)

3.2

The molar mass of ethylene($C_2{H}_4$) is 28 $g/mol$.

Thus, 4 grams of ethylene corresponds to $0.143$ moles.

At STP, one mole occupies 22.4 $L$.

Thus, 0.143 moles will occupy $22.4\times 0.143=3.2L$.

Hence, the correct answer is option $\text{D}$.