The \( C_{P} / C_{V} \) ratio for a gas mixture consisting of \( 4 \mathrm{gms} \) helium and \(...

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The \( C_{P} / C_{V} \) ratio for a gas mixture consisting of \( 4 \mathrm{gms} \) helium and \( 32 \mathrm{gms} \) of oxygen is:
(a) 1.45
(b) 1.6
(c) 1.5
(d) 1.66
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