The mass of the flask is measured when the outside of the flask is wet. However,
ID: 906326 • Letter: T
Question
The mass of the flask is measured when the outside of the flask is wet. However, the flask is dried before it is measured.
Will the mass of vapor in the flask be reported too high or too low, or will it be unaffected? The mass of the vapor will be reported too high because we will mistake the mass of that water with the mass of the vapor. ORR the mass of the vapor will be too low because the mass of the flask will take away from the mass of the vapor
Will the molar mass of the vapor in the flask be reported too high, too low, or unaffected? The molar mass will be reported as too high as well because the mass of the vapor will be reported as higher than it actually is, therefore resulting in higher number of moles ORRR same as A
Am I on the right track??
Explanation / Answer
If you are just weighting the flask and calculating its mass then
a) The mass of the vapor will be reported too high because we will mistake the mass of that water with the mass of the vapor.
is the correct answer and correspondingly
The molar mass will be reported as too high as well because the mass of the vapor will be reported as higher than it actually is, therefore resulting in higher number of moles.
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