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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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