calculate the mass of 45.0 L of Cl2 at 87.0°C and 950. mm Hg.

use the ideal gas law formula and here are values for R:

8.134 (L * kPa)/(mol * K)

0.0821 (atm * L)/(mol * K)

62.364 (L * mmHg)/(mol * K)

include the following with your answer:

Which Gas Law constant did you use or which “R” value did you use? Why?

The numerical answer to the question.

An explanation of the correct number of significant figures you will use for the numerical answer.