Calculate the amount of metal substance in 10.8 g of which contains 2.4 * 10 ^ 23 atoms and name the metal.

avogadro number describes the number of atoms (ions, etc.) in a molecule of a substance
it is 6.02 * 10 ^ 23
2.4 * 10 ^ 23 / 6.02 * 10 ^ 23 = 0.4 mol
so the molecular weight is m / n = 10.8 / 0.4 = 27
metal – aluminum.



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