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At \( 300 \, \mathrm{K} \), a sample of \( 3.0 \, \mathrm{g} \) of gas A occupies the same volume as \( 0.2 \, \mathrm{g} \) of hydrogen at \( 200 \, \mathrm{K} \) at the same pressure. The molar mass of gas A is _______ \( \mathrm{g \, mol^{-1}} \). (nearest integer) Assume that the behavior of gases as ideal. (Given: The molar mass of hydrogen (\( \mathrm{H_2} \)) gas is \( 2.0 \, \mathrm{g \, mol^{-1}} \).)

A \( 10 \, \text{g} \) mixture of hydrogen and helium is contained in a vessel of capacity \( 0.0125 \, \text{m}^3 \) at \( 6 \, \text{bar} \) and \( 27^\circ \text{C} \). The mass of helium in the mixture is ______ g. (nearest integer) Given : \( R = 8.3 \, \text{J K}^{-1} \text{mol}^{-1} \) (Atomic masses of H and He are \( 1u \) and \( 4u \), respectively)

A mixture of hydrogen and oxygen contains \( 40\% \) hydrogen by mass when the pressure is \( 2.2 \, \mathrm{bar} \). The partial pressure of hydrogen is _______ bar. (Nearest Integer)