Flask \( \mathrm{X} \) is filled with \( 20 \mathrm{~g} \) of \( \mathrm{CH}_{4} \) gas at \( 10...

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Flask \( \mathrm{X} \) is filled with \( 20 \mathrm{~g} \) of \( \mathrm{CH}_{4} \) gas at \( 100^{\circ} \mathrm{C} \) and another identical flask \( Y \) with \( 40 \mathrm{~g} \mathrm{O}_{2} \) gas at the same temperature. Which one of the following statements is correct? [Molar masses in \( \mathrm{g} \mathrm{mol}^{-1} \) of \( \mathrm{CH}_{4}=16.0 \) and \( \left.\mathrm{O}_{2}=32.0\right] \)
(A) The pressure of the gases in the two flasks are identical.
(B) The pressure of \( \mathrm{CH}_{4} \) in flask \( \mathrm{X} \) is higher than that of \( \mathrm{O}_{2} \) in flask Y.
(C) The pressure of \( \mathrm{CH}_{4} \) in flask \( \mathrm{X} \) is lower than that of \( \mathrm{O}_{2} \) in flask Y.
(D) The pressure of \( \mathrm{CH}_{4} \) in flask \( \mathrm{X} \) is half that of \( \mathrm{O}_{2} \) in flask Y.
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