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[1]- An alloy of silicon and iron (Si-Fe) has 0.25 wt% of Si. If the density...

[1]- An alloy of silicon and iron (Si-Fe) has 0.25 wt% of Si. If the density and atomic weight are 2.33 ? ??3 and 28 ? ??? for silicon and 7.87 ? ??3 and 55.85 ? ??? for iron, calculate: a) Atomic percentage of silicon and iron. b) Density of iron in the alloy ( ?? ?3 ). c) Average atomic weight of the alloy ( ? ??? ). d) Number of moles of silicon and iron.

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