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BCECE Medical BCECE Medical Solved Papers-2001

  • question_answer
    A mixture of gas contains 8 g of oxygen and 7 g of nitrogen. To use the equation \[PV=nRT\], the value of n of such mixture will be :

    A)  \[\frac{1}{2}\]               

    B)  \[\frac{1}{4}\]

    C)  2               

    D)  4

    Correct Answer: A

    Solution :

    Number of moles of oxygen \[=\frac{8}{32}=\frac{1}{4}\] Number of moles of nitrogen \[=\frac{7}{28}=\frac{1}{4}\] Therefore, total number of moles in mixture of two gases, \[n=\frac{1}{4}+\frac{1}{4}=\frac{1}{2}\]


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