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9th Class Science Sample Paper Science Olympiad Model Test Paper-13

  • question_answer
    A 0.24 g sample of a compound of oxygen and boron was found by analysis to contain 0.096 g of boron and 0.144 g of oxygen. Calculate the percentage composition of the compound by mass.

    A) Boron : Oxygen = 40 : 60

    B) Boron: Oxygen = 60 : 40

    C) Boron : Oxygen = 30 : 70

    D) Boron : Oxygen = 70 : 30

    E) None of these

    Correct Answer: A

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