The Ideal Gas Law: Molar Mass Video Lessons

Concept: Molar Mass

# Problem: An experiment shows that a 114 mL gas sample has a mass of 0.171 g at a pressure of 720 mm Hg and a temperature of 33 oC.What is the molar mass of the gas?

###### FREE Expert Solution

Using the ideal gas equation.

$\overline{){\mathbf{P}}{\mathbf{V}}{\mathbf{=}}{\mathbf{n}}{\mathbf{R}}{\mathbf{T}}}$

Isolate n (number of moles of gas):

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###### Problem Details

An experiment shows that a 114 mL gas sample has a mass of 0.171 g at a pressure of 720 mm Hg and a temperature of 33 oC.

What is the molar mass of the gas?

What scientific concept do you need to know in order to solve this problem?

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