Calculating Mass Fraction of Inerts in Gas Mixture

[juice34]

Homework Statement

What is the mass fraction of CO, CO2, H2, CH4, and Inerts in 3000metric tonnes of gas mixture, with mole percentages of:
-3.52mol% CO2
-27.86mol% CO
-67.99mol% H2
-0.21mol% CH4
-0.44mol% inerts

Homework Equations

basic conversions, although we don't know the molar mass of the inerts.

 

[mrmiller1]

Hello!

You have to convert these from mole fraction to mass fraction, right?

The conversion is w_i=X_iM_i / ΣX_iM_i

X = mole frac., w = mass frac., M = molar mass.

Leave M for the inerts unknown. You need another equation to solve for the inert's molar mass or cancel it out.

Hint: the sum of the weight fractions must equal 1.