Question

A mixture of 0.220 moles co, 0.350 moles n2 and 0.640 moles ne has a total pressure of 2.95 atm. what is the pressure of co? 8) _______
a.0.536 atm
b.0.955 atm
c.1.54 atm
d.1.86 atm
e.0.649 atm

Answer 1

Assuming the system is an ideal gas where the intermolecular forces are very limited. In this case the ratio of the pressure to the total pressure is equal to the ratio of the moles of CO to the total number of moles. Therefore,

n/n,total = p/p,total
0.22/(0.22+0.35+0.64) = P/2.95
P = 0.536 atm