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Respuestas a la pregunta
3
a. KMnO4
K: 1 x 39,09 = 39.09 g/mol
Mn: 1 x 54,93 = 54,93 g/mol
O: 4 x 16 = 64g/mol
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PM = 158.02 g/mol
b. H3PO4
H: 3 x 1 = 3 g/mol
P: 1 x 39.07 = 30.97 g/mol
O: 4 x 16 = 64 g/mol
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PM = 97.97 g/mol
c. MnCl2
Mn: 1 x 54,93 = 54,93 g/mol
Cl: 2 x 35,45 = 70.9 g/mol
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PM = 125.83 g/mol
d. KCl
K: 1 x 39,09 = 39.09 g/mol
Cl: 1 x 35,45 = 35.45 g/mol
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PM = 74.57 g/mol
4.
sustancia: KCl
fórmula:n = masa/PM
Mm KCl = 74.57 g/mol
a) 2 moles
masa = 2 mol x 74.57 g/mol
masa = 149.08 g KCl
b) 3.5 moles
masa = 3.5 mol x 74.57 g/mol
masa = 260.995 g KCl
sustancia: KMnO4
PM KMnO4 = 158.02 g/mol
a) 2 moles
masa = 2 mol x 158.02 g/mol
masa = 315.04 g KMnO4
b) 3.5 moles
masa = 3.5 mol x 158.02 g/mol
masa = 553.07 g KMnO4