An Unknown Gas Occupies a Volume of 1250 ML at 26

question 5

Multiple Choice

An unknown gas occupies a volume of 1250 mL at 26 °C and 705 torr.If the mass is 2.37 g,what is the molar mass of the gas? (R = 0.0821 atm•L/mol•K)

• A)14.0 g/mol
• B)43.2 g/mol
• C)50.2 g/mol
• D)67.5 g/mol
• E)78.4 g/mol

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