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a volatile liquid was allowed to evaporate in a 43.298g flask that has a total volume of 252 mL.,the temperature of the water b...Asked by Linda
A vilatile liquid was allowed to evaporate in a 43.298 g flask that has a total volume of 252 ml. The temperature of the water bath was 100 degree Celsius at the atmospheric pressure of 776 torr. The mass of the flask and condensed vapor was 44.173 g.
Calculate the molar mass of the liquid?
Calculate the molar mass of the liquid?
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Answered by
DrBob222
Use PV = nRT to calculate n = number of moles.
Then moles = grams/molar mass. You have moles from the first equation and you have grams (from the difference if mass of the flask); calculate molar mass.
Then moles = grams/molar mass. You have moles from the first equation and you have grams (from the difference if mass of the flask); calculate molar mass.
Answered by
bobby
moles of gas = PV / RT
= 776 x .252 / 62.363 x (273+100) =0.00841 moles
which have mass of 44.173 - 43.298 g = 0.875g
molar mass = 0.875g / 0.00841 moles = 104.1 g/ mole
= 776 x .252 / 62.363 x (273+100) =0.00841 moles
which have mass of 44.173 - 43.298 g = 0.875g
molar mass = 0.875g / 0.00841 moles = 104.1 g/ mole
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