Question

Which fraction would be used to find the new volume of a gas at 760 $torr$ under its new pressure at 900 $torr$ if the temperature is kept constant?

• A. $\frac{900}{760}$
• B. $1.18$
• C. $\frac{760}{900}$
• D. $\frac{658.7}{798.7}$
  
• E. $\frac{798.7}{658.7}$
  

Answer 1

The correct option is C $\frac{760}{900}$

$V\propto \frac{1}{P}$ ($n$ and $T$ constant)
$P_1{V}_1=P_2{V}_2$
$760V_1=900V_2$
$V_2=\frac{760}{900}{V}_1$
Hence, the fraction $\frac{760}{900}$ would be used to find the new volume.