An experiment shows that a 118 mL gas sample has a mass of 0.161 g at a pressure of 730 mmHg and a temperature of 32 ∘C. What is the molar mass of the gas?

35.54g/mole

Explanation:

using the formula PV=nRT will allow you to solve for n which is the number of moles.  R is a constant and you should use 62.3637 L mmhg/mol K.

In order to make sure your units match you have to convert the 118ml of gas to .118L and temperature needs to be converted to Kelvin.  32C + 273=305K

now you can use the formula to solve for n = number of moles  once you get that number you will need to divide that by .161g.  Molar mass is g/moles