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Exercício de Mol

por Cláudia (Colégio Padre Eustáquio) Fácil Friday, March 28th, 2014


O rótulo de um frasco contendo um suplemento vitamínico informa que cada comprimido contém 6.10-6 gramas de vitamina B12. Esta vitamina apresenta 1 mol de cobalto por mol de vitamina. Considerando a massa molar de cobalto 60g/mol,qual o número aproximado de átomos de cobalto que um indivíduo ingere quando toma 4 comprimidos?

a)4,8×1015 b)2,4×1017 c)6×1018 d)2,4×1012 e)4,8×107

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