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

  • question_answer
    Calculate the weight of \[0.8\] moles of magnesium.

    A)  \[20\,\,g\]         

    B)         \[30\,\,g\]  

    C)  \[19.2\,\,g\]      

    D)         \[31.2\,\,g\]

    Correct Answer: B

    Solution :

     \[1\] mole of\[Mg=24\,\,g\]\[0.8\]moles of\[Mg=24\times 0.8=19.2\,\,g\]


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