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24 August, 06:20

The 54.9-g sample of the compound X2O7 contains 33.6 g of oxygen atoms. What is the molar mass of element X?

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  1. 24 August, 08:02
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    Mass of X₂O₇ = 54,9g

    2x + 33,6g = 54,9g

    2x = 54,9g - 33,6g

    2x = 21,3g | : 2

    x = 10,65g/mol
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