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

  • 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= 40%, Oxygen = 60%

    B) Boron = 60%, Oxygen = 40%

    C) Boron = 30%, Oxygen = 70%

    D) Boron = 70%, Oxygen = 30%

    E) None of these

    Correct Answer: A

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