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JEE Main & Advanced Sample Paper JEE Main Sample Paper-41

  • question_answer
    What weight of ammonia contains the same number of molecules as 11.2 L of oxygen at STP?

    A)  17 g                           

    B)  8.5 g

    C)  16 g                           

    D)  8 g

    Correct Answer: B

    Solution :

    Since 11.2Lof \[{{O}_{2}}\]gas contain half mole ie, N/2 molecules, hence half mole of \[N{{H}_{3}}\] will weigh \[=\frac{molecular\,weight}{2}=\frac{17}{2}=8.5g\]


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