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A 2.000g sample of magnesium was burned in air to form an oxide. After the product was purified it was found to have a mass of 3.317g. What is the empirical formula for the product?

I know how to find a empirical formula, I just don't understand what masses I am supposed to use. Would it be 2.000g Mg and 1.317g O?

  • chemistry -

    Yes. Mass Mg - 2.000 in the problem.
    3.317 - 2.000 = mass oxygen = 1.317 g.

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