Question

halle el peso molecular de la sustancia

K2 Cr2 O7

Answer 1

K2 Cr2 O7

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