Choose the molecular formula of an oxide of iron in which the mass per cent of iron and oxygen are 69.9 and 30.1 respectively and its molecular mass is 160. *
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a pieceof iron ore is found to contain a compound containing 72.3% iron and 27.7% oxygen with molecular mass 231.4 gm/mol. find the molecular formula. Thus, ore contain 167.30 g of iron and 64.1 g of oxygen. Similarly, number of oxygen atom = 64
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