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9th Class Science Atoms and Molecules Question Bank Atoms and Molecules

  • question_answer
    How many grams of \[N{{a}_{2}}C{{O}_{3}}\] weighed to get \[0.1\] mole\[N{{a}_{2}}C{{O}_{3}}\]?

    A) \[10\,\,g\]                      

    B)        \[5\,\,g\]

    C) \[10.6\,\,g\]         

    D)        \[12.6\,\,g\]

    Correct Answer: C

    Solution :

     \[1\] mole of\[N{{a}_{2}}C{{O}_{3}}=106\,\,g(GMW)\] Weight of \[0.1\] mole of\[N{{a}_{2}}C{{O}_{3}}\] \[=0.1\times 106=10.6\,\,g\]


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