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O: 38.1 g/ 16 g/mol = 2.381 mol
Na: 36.5 g/ 23 g/mol = 1.587 mol
dividir cada elemento entre el menor de los resultados:
S: 0.794 mol / 0.794 mol = 1
O: 2.381 mol / 0.794 mol = 3
Na: 1.587 mol / 0.794 mol = 2
FE: Na2SO3
Mm de la FE
Na: 2 x 23 = 46 u
S: 1 x 32 = 32 u
O: 3 x 16 = 48 u
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Mm = 126 u
n = 126 u / 126 u = 1
FM = (NaSO3)n = (NaSO3)1 = Na2SO3 ( sulfito de sodio )