Question

What weight of $S{O}_2$ can be made by burning sulphur in $5.0$ moles of oxygen?

• A. $640$ grams
• B. $160$ grams
• C. $80$ grams
• D. $320$ grams

Answer 1

The correct option is D $320$ grams

$S+O_2\to S{O}_2$

$1$ mole of $O_2$ gives $1$ mole of $S{O}_2$

Thus $5$ mole of $O_2$ will give 5 mole of $S{O}_2$

Thus amount of $S{O}_2$ in 5 mole $S{O}_2$ is

$m=5mole\times 64g/molem=320g$

Thus $5$ mole of $O_2$ will obtain $320g$ of $S{O}_2$

Hence, the correct option is D.