A sealed rigid container holds an equimolar mixture of Helium () and Methane (). If a tiny pinhole is made, what is the exact initial composition by mass of the effusing gas mixture (He : CH4)?

Question

A sealed rigid container holds an equimolar mixture of Helium ($He$) and Methane ($CH_4$). If a tiny pinhole is made, what is the exact initial composition by mass of the effusing gas mixture (He : CH4)?

Prashant Kotian · Accepted Answer

Correct answer: B. Initial mole ratio is , so partial pressures are equal. Rate ratio (moles) . The effusing gas contains of for every of . Mass ratio = .

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