A volatile compound with a mass of 0.8822 grams is placed in an evacuated 0.250 L flask. The flask is heated to evaporate the compound. At 99°C, the pressure in the flask is 1.25 atm. What is the molar mass of the compound?     86.2 g/mol     116 g/mol     229 g/mol     257 g/mol                 303 g/mol

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