Chemestry
posted by Karla
What is the molecular mass of a gas that has a density of 0.897 g/L if it exerts a pressure of 1.35 ATM and is that a temperature of 43.5°C?

DrBob222
p*molar mass = density*RT
Remember T must be in kelvin. 
bobpursley
assume 100Liters, mass then is 89.7 grams
PV=nRT
so you have P, v(100lites), n=mass/molmass and you know mass, Look up R for your units, and you know temperature
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