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

  • question_answer
    Which of the following element's gram weight is \[6\,\,g\]for \[0.25\] moles of that element?

    A)  Chlorine           

    B)         Magnesium  

    C)  Boron              

    D)         Carbon

    Correct Answer: B

    Solution :

    \[n=0.25\,\,moles=\frac{1}{4}mole\] Mass\[(m)=6\,\,g\] Molecular weight\[(M)=\frac{m}{n}\]\[i.e.\]magnesium=\[\frac{6}{(1/4)}=24\,\,g\]


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