Ayudenme les agradeceria grandemente..............
establece la masa molecular y el porcentaje en peso de los siguientes compuestos:
Ca (OH)2
H2O
CO2
SO2
Respuestas
Respuesta dada por:
2
Ca(OH)2
1. calcular Masa molecular:
Ca: 1 x 40 = 40 g/mol
H: 2x 1 = 2 g/mol
O: 2 x 16 = 32 g/mol
``````````````````````````````
Mm = 74 g/mol
2. Calcular % de cada elemento
Calcio (Ca):
74 g ---- 100 %
40 g ----- x
x = 54.05 % Ca
Hidrógeno (H):
74 g ---- 100 %
2 g ---- x
x = 2.70 % H
Oxigeno (O):
74 g ---- 100 %
32 g ---- x
x = 43.24 % O
b) H2O
1. calcular Masa molecular:
H: 2 x 1 = 2 g/mol
O: 1 x 16 = 16 g/mol
``````````````````````````````
Mm = 18 g/mol
2. Calcular % de cada elemento
Hidrógeno (H):
18 g ---- 100 %
2 g ---- x
x = 11.11 % H
Oxigeno (O):
18 g ---- 100 %
16 g ---- x
x = 88.89 % O
c) CO2
1. calcular Masa molecular:
C: 12 x 1 = 2 g/mol
O: 2 x 16 = 32 g/mol
``````````````````````````````
Mm = 44 g/mol
2. Calcular % de cada elemento
Carbono (C):
44 g ---- 100 %
12 g ---- x
x = 27.27 % C
Oxigeno (O):
44 g ---- 100 %
32 g ---- x
x = 72.72 % O
d) SO2
1. calcular Masa molecular:
S: 32 x 1 = 32 g/mol
O: 2 x 16 = 32 g/mol
``````````````````````````````
Mm = 64 g/mol
2. Calcular % de cada elemento
Azufre (S):
64 g ---- 100 %
32 g ---- x
x = 50 % S
Oxigeno (O):
64 g ---- 100 %
32 g ---- x
x = 50 % O
1. calcular Masa molecular:
Ca: 1 x 40 = 40 g/mol
H: 2x 1 = 2 g/mol
O: 2 x 16 = 32 g/mol
``````````````````````````````
Mm = 74 g/mol
2. Calcular % de cada elemento
Calcio (Ca):
74 g ---- 100 %
40 g ----- x
x = 54.05 % Ca
Hidrógeno (H):
74 g ---- 100 %
2 g ---- x
x = 2.70 % H
Oxigeno (O):
74 g ---- 100 %
32 g ---- x
x = 43.24 % O
b) H2O
1. calcular Masa molecular:
H: 2 x 1 = 2 g/mol
O: 1 x 16 = 16 g/mol
``````````````````````````````
Mm = 18 g/mol
2. Calcular % de cada elemento
Hidrógeno (H):
18 g ---- 100 %
2 g ---- x
x = 11.11 % H
Oxigeno (O):
18 g ---- 100 %
16 g ---- x
x = 88.89 % O
c) CO2
1. calcular Masa molecular:
C: 12 x 1 = 2 g/mol
O: 2 x 16 = 32 g/mol
``````````````````````````````
Mm = 44 g/mol
2. Calcular % de cada elemento
Carbono (C):
44 g ---- 100 %
12 g ---- x
x = 27.27 % C
Oxigeno (O):
44 g ---- 100 %
32 g ---- x
x = 72.72 % O
d) SO2
1. calcular Masa molecular:
S: 32 x 1 = 32 g/mol
O: 2 x 16 = 32 g/mol
``````````````````````````````
Mm = 64 g/mol
2. Calcular % de cada elemento
Azufre (S):
64 g ---- 100 %
32 g ---- x
x = 50 % S
Oxigeno (O):
64 g ---- 100 %
32 g ---- x
x = 50 % O
snorye:
HCrO Calcular Mm
H: 1 x 1 = 1 g/mol
Cr: 1 x 52 = 52 g/mol
O: 1 x 16 0 16 g/mol
```````````````````````````````
Mm = 69 g/mol
Hidrógeno
69 g ---- 100 %
1 g ----- x
X = 1.45 % H
69 g ---- 100 %
52 g ---- x
X = 75.36 % Cr
Oxigeno
69 g ---- 100 %
16 g ---- x
X = 23.19 % O
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