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Question:

please help with this problem i know it is easy but im still confused :( ten points?thanks?

What is the weight of iron contained in 100g of an iron ore which is 80.00 % hematite, Fe2O3? (iron ore is a rock which contains a misture of hematite and other minerals)

Answer:

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I run all the dishes in direction of the dishwasher, alongside with all the puppy dishes, (plastic, stainless, ceramic, glass porcelain, stoneware, etc) i do no longer propose utilising bleach around pets or infants, chlorine bleach is a techniques too risky.
Atomic weights: Fe 56, O 16 1 mol Fe2O3 contains 2 * 56 112 g Fe and 16 * 3 48 g O % of Fe in Fe2O3 100 * 112/(112+48) 70 100 g iron ore contains 80.00 g Fe2O3 80.00 g Fe2O3 contains 80.00 * 70/100 56 g (Answer)

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