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Cálculos de composición porcentual y fórmula empírica.
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Mind Map on Cálculos de composición porcentual y fórmula empírica., created by Gabriel Somarriba on 25/10/2016.
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Gabriel Somarriba
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Gabriel Somarriba
over 7 years ago
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Resource summary
Cálculos de composición porcentual y fórmula empírica.
Composición porcentual.
Los elementos se encuentran en una cantidad porcentual dada.
Mediante la formula química, es posible saber el porcentaje de masa.
Ejemplo:
SO2: 1 átomo de azufre, 2 de oxígeno.
Masa atómica del S=32.1
%S=masa S/masa SO2 *100
Masa del O2= 16*2=32
Suma Total=64.1
%O=masaO/masa SO2
Fórmula empírica.
Mediante calculo elementales y la composición porcentual podemos determinar la composición porcentual
Ejemplo:
Muestra de: 27.3% de C y 72.7 de O
C
Moles de C=27.3* 1 mol de C/12=2.28
2.28/2.28= 1 C
CO2
O
Moles de O= 72.7*1 mol de O/15.9=4.54
4.54/2.28=2 O
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