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

  • question_answer
    Sulphur molecule exists as\[{{S}_{8}}\]. How many moles of sulphur are present in \[25.6\] grams of sulphur?

    A)  \[0.01\]moles    

    B)         \[0.1\]moles  

    C)  \[0.02\]moles    

    D)         \[0.2\]moles

    Correct Answer: B

    Solution :

     \[1\] mole of sulphur molecule\[=32\times 8=256\,\,g\] \[25.6\,\,g\] of sulphur has \[=\frac{25.6}{256}=0.1\]moles


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