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Masa molecular Fe3 (PO4)2:
Fe: 3 x 55.85 g = 167.55 g/mol
P: 2 x 30.97 g = 61.94 g/mol
O: 8 x 16 g = 128 g/mol
Mm = 357.49 g/mol
CARBONO:
357,49 g ------ 100 %
167.55 g ------ x
x = 46.86 % de C
FOSFORO:
357,49 g ------ 100 %
61.94 g ------ x
x = 17.326 % de P
OXIGENO:
357,49 g ------ 100 %
128 g ------ x
x = 35.805 % de O
2.
Masa molar Al2(SO4)3
Al: 2 x 27 g = 54 g/mol
S: 3 x 32 g = 96 g/mol
O: 12 x 16 g = 192 g/mol
Mm = 342 g/mol
ALUMINIO:
342 g ----- 100 %
54 g ------ x
X = 15.789 % de Al
AZUFRE
342 g ----- 100 %
96 g ------ x
X = 28.070 % de S
OXIGENO:
342 g ----- 100 %
192 g ------ x
X = 56.14 % de O
3.
Masa molecular NH4NO3
N: 2 x 14 g = 28 g/mol
H: 4 x 1 g = 4 g/mol
O: 3 x 16 g = 48 g/mol
Mm = 80 g/mol
NITROGENO:
80 g ---------100%
28 g ------- x
x = 35 % de N
HIDROGENO:
80 g ---------100%
4 g ------- x
x = 5 % de H
OXIGENO:
80 g ---------100%
48 g ------- x
x = 60 % de O