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13 July, 10:47

A single gram of a certain metallic substance has 0.52 g of copper and 0.25 g of zinc the remaining portion of the substance is nickel been estimated that 0.2 g of nickel is in 1 g of the sub since he use this to estimate the amount of nickel and 35 g of the substance find the result of Ben's estimation strategy then find the exact amount of the nickel in 35 g of nickel in 35 grams of the substance

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  1. 13 July, 10:51
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    Ben's estimate gives 7 g of nickel; the actual amount is 8.03 g.

    In 1 g of the substance, there is 0.52 g of copper and 0.25 g of zinc; this gives

    0.52+0.25 = 0.77 g of the substance.

    The remaining part of the substance is nickel:

    1-0.77 = 0.23 g of nickel.

    Using Ben's estimate, 0.2 g of nickel per gram of substance, we have

    0.2 (35) = 7 g of nickel in 35 g of the substance.

    The actual amount is 0.23 (35) = 8.03 g of nickel in 35 g of the substance.
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