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Find the speed of sound in a mixture of ...

Find the speed of sound in a mixture of 1 mol of helium and 2 mole of oxygen at `27^(@)C`.

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`y_(min)=(C_(pmix))/(C_(v mix))=((19R//6))/((13R//6))=(17)/(13)`
`M_(mix)=(n_(1)M_(1)+n_(2)M_(2))/(n_(1)+n_(2))=(1xx4+2xx32)/(1+2)`
`=(68)/(3)xx10^(-3)kg//mol, " " V= sqrt((gamma_(mix)RT)/(M_(mix)))~~400.9m//s`
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