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queennajas
08.10.2019 •
Chemistry
A19.4 gram sample of gas is found to have a volume of 1.3 liters at 282 k and 1.2 atm. what is the molar mass of this gas? show all of the work used to solve this problem.
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Ответ:
PV=nRT where P is pressure, V=volume, n= no. of moles, R=ideal gas constant, and T=temperature. This equation has to be dimensionally homogeneous. Use R=0.08206 L-atm/mol-K.
PV=nRT
(1.2 atm)(1.3 L)=n(0.08206)(282K)
n=0.0674 mol
In order to find the molar mass, divide the given mass with the obtained number of moles,
19.4 g/0.0674 mol = 287.78 g/mol
Ответ: