Homework Help: Chemistry 101

Posted by Eunice on Thursday, April 30, 2009 at 10:21pm.

A gaseous compound has a density of 0.355 g/L at 17 degree celcius and 189 mmHg. What is the molar mass of the compound?

Chemistry 101 - DrBob222, Thursday, April 30, 2009 at 10:30pm
Use PV = nRT which can be re-arranged to
PV = (g/M)RT where M is the molar mass. Since density = g/L, we can substitute to make it
PVM = gRT and
PM = (g/V)RT.
Solve for M
Chemistry 101 - Eunice, Sunday, May 3, 2009 at 8:33pm
what is mmHg

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