cual es el que presenta el mayor porcentaje de sodio en los compuestos ?
a) Oxido de sodio.
b) Hidroxido de sodio
c) Cloruro de sodio
d) Hipoclorito de sodio
e) cloruro de hidrogeno
Respuestas a la pregunta
cual es el que presenta el mayor porcentaje de sodio en los compuestos ?
a) Oxido de sodio (Na2O)
Na: 2 x 23 = 46 g/mol
O: 1 x 16 = 16 g/mol
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Mm = 62 g/mol
% de sodio (Na)
62 g ------ 100 %
46 g ------- x
x = 74.19 %
b) Hidroxido de sodio: NaOH
Na: 1 x 23 = 23 g/mol
O: 1 x 16 = 16 g/mol
H: 1 x 1 = 1 g/mol
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Mm = 40 g/mol
% de sodio (Na)
40 g ---- 100 %
23 g ---- x
x = 57.5 %
c) Cloruro de sodio: NaCl
Na: 1 x 23 = 23 g/mol
Cl: 1 x 35.5 = 35.5 g/mol
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Mm = 58.5 g/mol
% de sodio (Na)
58.5 g ---- 100 %
23 g ---- x
x = 39.32 %
d) Hipoclorito de sodio: NaClO
Na: 1 x 23 = 23 g/mol
Cl: 1 x 35.5 = 35.5 g/mol
O: 1 x 16 = 16 g/mol
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Mm = 74.5 g/mol
% de sodio (Na)
74.5 g ---- 100 %
23 g ---- x
x = 30.87 %
e) cloruro de hidrógeno: HCl
H: 1 x 1 = 1 g/mol
Cl: 1 x 35.5 = 35.5 g/mol
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Mm = 36.5 g/mol
% H
36.5 g ---- 100 %
1 g ---- x
x = 2.74 % H
% Cl
36.5 g ---- 100 %
35.5 g ---- x
x = 97.26 % Cl
el compuesto con mayor % es el óxido de sodio (a)