Question

At $25{}^{o}C$ and $730\text{mm}$ pressure, $380\text{mL}$ of dry oxygen is collected. If the temperature is constant, what will be the volume of oxygen at $760\text{mm}$ pressure?

• A. $569\text{mL}$
• B. $365\text{mL}$
• C. $265\text{mL}$
• D. $621\text{mL}$

Answer 1

The correct option is B $365\text{mL}$

As given,
$V_1=380\text{mL}$, $P_1=730\text{mm}$, $V_2=?$
$P_1=760\text{mm}$
According to Boyle's law ,
$P_1{V}_1=P_2{V}_2$
$\Rightarrow V_2=\frac{P_1{V}_1}{P_2}=\frac{730\times 380}{760}=365\text{mL}$