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

  • question_answer
    The approximate production of sodium carbonate per month is \[424\times {{10}^{6}}g\] while that of methyl alcohol is\[320\times {{10}^{6}}g\]. Which of the following is produced more in terms of number of moles?

    A)  Sodium carbonate         

    B)  Methyl alcohol  

    C)  Both [a] and [b]

    D)         Data insufficient

    Correct Answer: B

    Solution :

     Gram formula weight or weight of \[1\] mole of \[N{{a}_{2}}C{{O}_{3}}=106\,\,g\] Gram formula weight of methyl alcohol or weight of one mole of\[C{{H}_{3}}OH=32\,\,g\] Number of moles of\[N{{a}_{2}}C{{O}_{3}}\]produced per month\[=\frac{424\times {{10}^{6}}}{106}=4\times {{10}^{6}}\]moles. The number of moles of \[C{{H}_{3}}OH\]produced per month\[=\frac{320\times {{10}^{6}}}{32}=10\times {{10}^{6}}\]moles. Hence, methyl alcohol is produced more than sodium carbonate in terms of number of moles.


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