What is the molar mass of an ideal gas if a 0.622 g sample of this gas occupies a volume of 300. mL at 35°C and 789 mm Hg?
a) 44.8 g•mol –1
b) 48.9 g•mol –1
c) 50.5 g•mol –1
d) 54.5 g•mol –1
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