Chem help please confused

Question

I have a mixture of three gases in a flask at 25 ^oC. The total pressure in the flask is 26.2 psi. If my gas mixture consists of 13.2 g of CHCl₃, 25.8 g of HCl, and 3.2 g of H₂, what is the pressure of each gas in the flask?

Give each pressure to the nearest 0.1 psi:

CHCl₃ = 

HCl = 

H₂ = 

Answer 1

Since Temperature and Volume are the same for all three games, the number of moles is different for each gas.

This is why the mole fraction is used.

MOle fraction=individual mole/sum of all different moles.

This is like a "percent" formula for ideal gases.

Pressure of individual gas=mole fraction×total pressure.

Moles CHCl3=13.2/(12.01+1.01 + 3×35.45) or 0.111 mole

Moles HCl=25.5/(1.01 + 35.45) or 0.71 mole

Moles H2=3.2/(2×1.01) or 1.58 moles

Mole sum=0.111 + 0.71 + 1.58 or 2.401 moles

Pressure CHCl3=(0.111/2.401)×26.2 psi or 1.21 psi

Pressure HCl=(0.71/2.401)×26.2 psi or 7.75 psi

Pressure H2=(1.58/2.401)×26.2 psi or 17.24 psi