Calculate mass % of He in a mixture of `O_(2)` and He gas at 3 atm and `27^(@)C` havin density `(5)/(3)` gm/litre [Take : R=0.08 atm litre `mol^(-1)k^(-1)`]

Calculate mass % of He in a mixture of `O_(2)` and He gas at 3 atm and

1.	Calculate mass % of He in a mixture of `O_(2)` and He gas at 3 atm and `27^(@)C` havin density `(5)/(3)` gm/litre [Take : R=0.08 atm litre `mol^(-1)k^(-1)`]
Answer» PM=dRT for mixture `3xxM_("avg")=((5)/(3))xx0.08xx300` `M_("avg")=(5xx8xx3)/(3xx3)=(40)/(3)` `M_("avg")=(100)/((x)/(4)+(100-x)/(32))=(40)/(3)rArr(100xx32xx4)/(32x+400-4x)=(40)/(3)` `32xx10xx3=28x+400` `=28x=960-400=560` x=20% `(20)/(10)=2`

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Calculate mass % of He in a mixture of `O_(2)` and He gas at 3 atm and `27^(@)C` havin density `(5)/(3)` gm/litre [Take : R=0.08 atm litre `mol^(-1)k^(-1)`]

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