Determine the valence of the elements by chemical formulas: Fe2S3, Na2O, HBr, Ag2S, SO2, Cr2O3, N2O5, AlCl3, CO2, Na2S, CaCl2.
| November 30, 2020 | education
Fe2S3 (+3 and -2)
Na2O (+1 and -2)
HBr (+1 and -1)
Ag2S (+1 and -2)
SO2 (+4 and -2)
Cr2O3 (+3 and -2)
N2O5 (+5 and -2)
AlCl3 (+3 and -1)
CO2 (+4 and -2)
Na2S (+1 and -2)
CaCl2 (+2 and -1)
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