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  3. 9th Class
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9th Class Science Sample Paper Science Olympiad Model Test Paper-21

  • question_answer
    The mass of \[3.011\times {{10}^{23}}\]molecules of chlorine is:

    A) Less than 36 g   

    B) Between 7 g and 20 g

    C) Exactly 78 g

    D) More than 40 g

    E) None of these

    Correct Answer: A

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