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16 August, 13:32

An ore sample with a mass of 92.3 g is found to contain 17.7% by mass iron. What mass of iron is contained in the ore?

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  1. 16 August, 15:13
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    19.18g of iron

    Explanation:

    To find the mass of iron, we simply find the amount of the ore in grammes that corresponds to 17.7% iron.

    We can do this mathematically. We simply place the 17.7 over 100 and multiply by the total mass of the iron.

    The mass of iron in the ore is thus: 17.7/100 * 92.3 = 19.18g

    The ore simply contains a mass of 19.18g of iron
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