JEE Main & Advanced Chemistry Some Basic Concepts of Chemistry Question Bank Atomic Molecular and Equivalent masses

  • question_answer The number of molecules in \[8.96\ L\] of a gas at \[{{0}^{o}}C\] and 1 atmosphere pressure is approximately                 [BHU 1993]

    A)                 \[6.02\times {{10}^{23}}\]              

    B)                 \[12.04\times {{10}^{23}}\]

    C)                 \[18.06\times {{10}^{23}}\]            

    D)                 \[24.08\times {{10}^{22}}\]

    Correct Answer: D

    Solution :

               \[\because \]   22.4L of a gas at STP has no. of molecules \[=6.023\times {{10}^{23}}\]                                 \[\therefore \]    8.96L of a gas at STP has no. of molecules \[=\frac{6.02\times {{10}^{23}}\times 8.96}{22.4}\]\[=2.408\times {{10}^{23}}\]\[=24.08\times {{10}^{22}}\].


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