Question

Por favor ayuda:
Escriba la formula molecular de cada uno de los siguientes compuestos:
a.) Formula empírica CH2, masa molar =84g/mol
b.) Formula empírica NH2Cl masa molar = 51,5g/mol

Answer 1

Escriba la formula molecular de cada uno de los siguientes compuestos:

a.) Formula empírica CH2, masa molar = 84g/mol

1. calcular Mm FE

C: 1 x 12 = 12 g/mol

H: 2 x 1 =   2 g/mol

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         Mm = 14 g/mol

2. calcular n

n =  Mm compuesto / Mm FE

n = 84 g/mol / 14 g/mol

n = 6

3. FM: (CH2)6 = C6H12

b.) Formula empírica NH2Cl masa molar = 51,5 g/mol

1. calcular Mm FE

N: 1 x 14 = 14 g/mol

H: 2 x 1 =   2 g/mol

Cl: 1 x 35.5 = 35.5 g/mol

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         Mm = 51.5 g/mol

2. calcular n

n =  Mm compuesto / Mm FE

n = 51.5 g/mol / 51.5 g/mol

n = 1

3. FM: (NH2Cl)1 = NH2Cl