Question #4fe76

1 Answer
Douglas K.
May 16, 2017

Let the volume, #V = 1"L"#, then we know that the mass, #m = 1.2"g"#.

Find number of moles using the Ideal Gas Law:

#PV = nRT#

where #P = 745"Torr"#, #T= 293^@"K"# and #R = 62.364 "L Torr"/"K mol"#

Solve the equation for n:

#n = (PV)/(RT)#

Substitute in the know values:

#n = ((745"Torr")(1"L"))/((62.364 "L Torr"/"K mol")(293^@"K"))#

The molecular mass is

#m/n#

#29.4"g"/"mol"#

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