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  3. 9th Class
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9th Class Science Sample Paper Science Olympiad Model Test Paper-15

  • question_answer
    Calculate the mass of a certain amount of carbon dioxide gas which contains the same number of molecules as are contained in 40 g of oxygen.

    A) 40 g

    B) 42 g

    C) 52 g

    D) 55 g

    E) None of these

    Correct Answer: D

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