Saturday
December 20, 2014

Homework Help: CHEMISTRY

Posted by Sandy on Friday, March 28, 2014 at 1:01am.

The mass of an erlenmeyer flask is 78.639g and the mass of the flask and water is 327.039. If the density of water is 1 g/ml then what is the true volume of the flask?

so i had subtracted the mass of just the flask from the mass of the flask and the water and got 248.4. Would that be the amount of the volume in mL? Can you do the calculation for me so I can better understand this because i need to do something so that grams are cancelled out but that would involve doing 1/248.4 which doesn't make any sense when I have to use this calculation to do a different calculation regarding trying to find the molar mass of a liquid?

Also, why is it that one can use the ideal gas law to obtain the molar mass for a liquid since it only applies to gases that act under ideal circumstances. Is it because the liquid is turned into vapor anyways and the mass of the condensed vapor is equal to the mass of the gas? Can anyone explain this?

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