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g Fe = 14 g x 80 g
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100 g
g Fe = 11.2 g
2. calcu lar mol de Fe
mol = masa/Mm
mol = 11.2 g / 56 g/mol = 0.2 mol
1 mol ----- 6.022 x 10²³ átomos
0.2 mol ----- x
x = 1.204 x 10²³ átomos de hierro