An Unknown Gas Occupies a Volume of 1

question 37

Multiple Choice

An unknown gas occupies a volume of 1.50 L at 21 °C and 0.950 atm.If the mass is 2.01 g,what is the molar mass of the gas? (R = 0.0821 atm•L/mol•K)

• A)19.0 g/mol
• B)30.7 g/mol
• C)34.0 g/mol
• D)69.1 g/mol
• E)76.6 g/mol