Question

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

• A. 365 mL
• B. 449 mL
• C. 569 mL
• D. 621 mL

Answer 1

Answer: (A)

As the temperature is constant, Boyle- law is applicable.
$p_{1}\, V_{1}=p_{2} \,V_{2} $
$V_{1}=380 \,m L, $
$p_{1}=730 \,m m, $
$V_{2}=? $
$p_{2}=760 \,m m$
$730 \times 380=760 \times V_{2} $
$V_{2}=\frac{730 \times 380}{760}=365 \,mL$