JEE Main & Advanced Chemistry States of Matter / पदार्थ की अवस्थाएँ - गैस एवं द्रव Question Bank Numerical Value Type Questions - Gaseous State

  • question_answer
    A gaseous mixture of He and \[{{O}_{2}}\] is found to have a density of \[0.518\,\,g{{L}^{-1}}\] at \[25{}^\circ C\] and 720 torr. What is the percent by mass of helium in this mixture?

    Answer:

    66.51


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