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I was planting a tree in my backyard and hit something hard. I dug it out and decided it was an ore of copper. I took its mass, and it was 65.0 grams. after some tricky experiments in my basement lab, I managed to extract 11.5 grams of copper. what is the mass percent of copper in the ore I discovered? a. 63.5%b. 18.1%c. 5.65%d. 17.7%

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  1. 13 June, 15:44
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    option (d) 17.7%

    Step-by-step explanation:

    Data provided in the question:

    Mass of the ore of copper extracted from the backyard = 65.0 grams

    Mass of the copper extracted from the ore of copper = 11.5 grams

    Now,

    The mass percent of copper discovered

    = [ (Mass of the copper extracted) : (Mass of the copper ore extracted) ] * 100%

    = [ 11.5 grams : 65.0 grams ] * 100%

    = 17.692% ≈ 17.7%

    Hence,

    the answer is option (d) 17.7%
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