Question

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

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

Answer 1

Answer: (A)

$200$ mL

Let, the volume of $O_3=x$ mL.

Volume of $O_2$ present $=(600-x)$ mL

$22400$ mL of $O_3$ and $O_2$ at STP will weight $48$ g and $32$ g respectively.

The weight of $x$ mL 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 $O_2\left(600mL\right)$ $=\frac{48x}{22400}+\frac{(600-x)\times 32}{22400}=1.0$.

$\therefore x=200$ mL