Question #191419

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 99C, the pressure in the flask is 1.25 atm. What is the molar mass of the compound?

Expert's answer

Using the gas equation,

"PV= nRT"

"1.25 \\times 0.250 = \\dfrac{0.8822}{x} \\times 0.083 \\times372"

"0.3125 = \\dfrac{0.8822}{x} \\times 30.876"

"x = \\dfrac{27.23}{0.3125}"

"x = 87.16"

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