Question

halle el peso molecular de las siguientes sustancias:
a. CaHo
b. H2SO4
c. KMnO4
d. K2 Cr2 O7

Answer 1

a. Ca(OH)2

Ca: 1 x 40 = 40 g/mol

 O: 2 x 16 = 32 g/mol

 H: 2 x 1 = 2 g/mol

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        Mm = 74 g/mol

b. H2SO4

H: 2 x 1 = 2 g/mol

S: 1 x 32 = 32 g/mol

O: 4 x 16 = 64 g/mol

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       Mm = 98 g/mol

c. KMnO4

 K: 1 x 39 = 39 g/mol

Mn: 1 x  55 = 55 g/mol

  O: 4  16 = 64 g/mol

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         Mm = 158 g/mol

d. K2Cr2O7

K: 2 x 39 = 78 g/mol

Cr: 2 x 52 = 104 g/mol

O: 7 x 16 = 112 g/mol

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        Mm = 294 g/mol