Question

Calcule la formula molecular de un computo que contiene 44.8% de potasio, 36.8% de azufre, y 18.3% de oxigeno y cuyo po formular 174.4 gramos

Answer 1

1. calcular moles de cada elemento

K: 44.8 g / 39 g/mol = 1.14 mol

S = 36.8 g / 32 g/mol = 1.15 mol

O: 18.3 g / 16 g/mol = 1.14 mol

2. dividir entre el menor de los resultados

K: 1.15 mol / 1.14 mol = 1

S: 1.15 mol / 1.14 mol = 1

O: 1.15 mol / 1.14 mol = 1

3. FE: KSO

4. Calcular Mm fe la FE

K: 1 x 39 = 39 g/mol

S: 1 x 32 = 32 g/mol

O: 1 x 16 = 16 g/mol

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       Mm = 97 g/mol

5. calcula n

n = Mm compuesto / Mm FE

n = 174.4 g/mol / 97 g/mol

n = 2

6. FM: (KSO)2 = K2S2O2