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chemistry

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a sample of vapor weighing 0.745 g filled a 250 ml flask when placed in a water bath at 98 degrees celsius. the barometric pressure that day was 753 torr. calculate the volume of the vapor at stp, and the weight of one mol of the volitile liquid

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    I would use (P1V1/T1) = (P2V2/T2) to convert volume of 250 at the conditions listed to STP. Convert V to liters, divide by 22.4 to convert to mols, then mol = g/molar mass and solve for molar mass.

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