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  5. Structure of the Atom

9th Class Science Structure of the Atom Question Bank Nature of Matter

  • question_answer
    Number of moles present in 128 gm of sulphur is

    A)  4                                            

    B)  1

    C)  8                            

    D)         0.5  

    Correct Answer: D

    Solution :

    Mol. weight of \[CO=12+16=28\]                 \[(CO)x=(28)x\] Mol. weight of\[(CO)x=70\times 2=140\] \[\Rightarrow \]               \[(28)x=140\] \[\therefore \]  \[x=\frac{140}{28}=5\]


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