Question

What is the volume (in litres) of oxygen required at STP to completely convert $1.5$ mol of sulphur into sulphur dioxide?

• A. $11.2$
• B. $22.4$
• C. $33.6$
• D. $44.8$

Answer 1

Answer: (C)

$33.6$

The reaction is $S+O_2\to S{O}_2$.

One mole of sulphur reacts with one mole of oxygen.

Thus, $1.5$ mol of oxygen will react with $1.5$ mol of sulphur.

At STP, $1$ mol of oxygen occupies $22.4$ L.

Hence, $1.5$ mol of oxygen will occupy $1.5\times 22.4=33.6$ L.

Hence, option C is correct.