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

  • question_answer
    Calculate the weight of \[3.0\] moles of\[KCl{{O}_{3}}\].

    A) \[245\,\,g\]        

    B)        \[249\,\,g\]

    C) \[367.5\,\,g\]        

    D)        \[24.5\,\,g\]

    Correct Answer: C

    Solution :

     Molecular weight \[KCl{{O}_{3}}\]             \[=39+35.5+16\times 3=122.5\] \[1\]mole of\[KCl{{O}_{3}}=12.25\,\,g\] \[3\]moles of\[KCl{{O}_{3}}=122.5\times 3=367.5\,\,g\]


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