# Three hundred milliliters of O_2 are collected at a pressure of 645 mmHg. What volume will this gas have a one atmospheric pressure?

Apr 13, 2016

${V}_{2} = 254.6 m L$

#### Explanation:

For this question we would use Boyle's equation for the relationship between Pressure and Volume

${P}_{1} {V}_{1} = {P}_{2} {V}_{2}$

${P}_{1} = 645 m m H g$
${V}_{1} = 300 m L$
${P}_{2} = 1 a t m = 760 m m H g$
V_2=?

$645 m m H g \left(300 m L\right) = 760 m m H g \left({V}_{2}\right)$

$\frac{645 \cancel{m m H g} \left(300 m L\right)}{760 \cancel{m m H g}} = \frac{\cancel{760 m m H g} \left({V}_{2}\right)}{\cancel{760 m m H g}}$

$254.6 m L = {V}_{2}$