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21 January, 20:29

If 350.0 grams of Cr2O3 are reacted with 235.0 grams of elemental silicon, 213.2 grams of chromium metal are recovered. What is the percent yield?

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  1. 21 January, 23:43
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    We calculate for the amount of chromium metal in the reactant by,

    = 350 x (mass of Cr2/mass of Cr2O3)

    = 350 x (104/152)

    = 239.47 grams

    The amount of Cr metal in the product is only 213.2 grams. Thus, the percent yield.

    percent yield = (213.2 grams/239.47) x 100%

    = 89%
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