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    Question

    What is the approximate percentage, by weight, of oxygen

    in the earth's crust?
    A 46.6% Correct Answer Incorrect Answer
    B 19.6% Correct Answer Incorrect Answer
    C 16.6% Correct Answer Incorrect Answer
    D 36.6% Correct Answer Incorrect Answer

    Solution

    45%-50% of the earth's crust is made up of oxygen in the formed of oxides, carbonates and other compounds. Oxygen plays a very important role in the existence of life on earth.

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