An experiment shows that a 252 mL gas sample has a mass of 0.433 g at a pressure of 760 mm Hg and a temperature of 34 degrees C. What is the molar mass of the gas?

1 Answer
Dec 2, 2016

Molar mass is 43.3.gmol1.

Explanation:

Gas law's shows that:

pV=nRT,

where p is the pressure of gas, V it's volume, n the amount of gas, in mols, R is the constant of gases, and T is the absolute temperature of the gas.

In I.S. units, R8.31.Jmol1K1.

Done molar mass is given by:

Mr=mn

we can write gas law's in the next form:

pV=mMrRT,

and we obtain:

Mr=mRTpV=0.433g8.31Jmol1K1(34+273,15)K7607601.013105Pa252106m3=
=43.3gmol1