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VMMC VMMC Medical Solved Paper-2011

  • question_answer
    \[4.6\times {{10}^{22}}\] atoms of an element weigh 13.8 g.  The atomic weight of that element is

    A) 290                                        

    B) 180                        

    C)  34.4                      

    D)         10.4

    Correct Answer: B

    Solution :

    \[4.6\times {{10}^{22}}\]atoms weight \[=13.8\,g\] Hence, \[6.02\times {{10}^{13}}\]atoms will weight \[=\frac{13.8\times 6.02\times {{10}^{23}}}{4.6\times {{10}^{22}}}=180.6g\](molar mass)


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