Question

$600mL$ of ozonised oxygen at STP were found to weigh one gram. What is the volume of ozone in the ozonised oxygen?

• A. $200mL$
• B. $150mL$
• C. $100mL$
• D. $50mL$

Answer 1

Answer: (A)

Let the volume of $O_3=xmL$
Volume of $O_2$ present $=(600-x)mL$
$22400m{L}^2$ of $O_3$ and $O_2$ at STP will weight $48g$ and $32g$ respectively
The weight of $xm{L}^2$ of $O_3=\frac{x\times 48}{22400}g$
The weight of $(600-x)mL$ of $O_2=\frac{(600-x)}{22400}\times 32$
Total weight of ozonised $O_2(600mL)$
$=\frac{48x}{22400}+\frac{(600-x)\times 32}{22400}=1.0$
$\therefore x=200mL$