Amixture of three noble gases has a total pressure of 1.25 atm. the individual pressures exerted by neon and argon are 0.68 atm and 0.35 atm, respectively. what is the partial pressure of the third gas, helium? use mc031-1.jpg. 0.22 atm 0.33 atm 1.03 atm 2.28 atm

Given information:

Gas mixture containing: Ne + Ar + He

Total pressure P = 1.25 atm

Partial pressure pNe = 0.68 atm

pAr = 0.35 atm

To determine:

Partial pressure of He i.e. pHe

Explanation:

As per Dalton's law, the total pressure of a gas mixture is equal to the sum of partial pressure of the gases

P = pNe + pAr + pHe

pHe = P - (pNe+pAr) = 1.25 - (0.68 + 0.35) = 0.22 atm

Partial pressure of He is 0.22 atm

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