Problem: Calculate the volume of each gas sample at STP52.0 mg Cl2.

Since we have the mass and the temperature and pressure (STP), we’re going to use the ideal gas equation to calculate the volume of the gas

STP means Standard Temperature and Pressure where:

P = 1 atm
 T = 0°C = 273.15 K

Recall that the ideal gas law is given by

$\boxed{\mathbf{PV}\mathbf{ }\mathbf{=}\mathbf{ }\mathbf{nRT}}$

rearrange the equation to derive volume

$$\begin{gathered} \frac{\cancel{\mathbf{P}}\mathbf{V}}{\cancel{\mathbf{P}}}\mathbf{ }\mathbf{=}\mathbf{ }\frac{\mathbf{nRT}}{\mathbf{P}} \\ \mathbf{V}\mathbf{ }\mathbf{=}\mathbf{ }\frac{\mathbf{nRT}}{\mathbf{P}} \end{gathered}$$