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Chemistry, 31.03.2021 14:00 ayoismeisjjjjuan

CHEMISTRY OXIDATION NUMBERS
please help me solve only 3 of those oxidation numbers

NO2
Cr2O72-
KCl
NH3
CaH2
SO42-
Na2O2
SiO2
CaCl2

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CHEMISTRY OXIDATION NUMBERS
please help me solve only 3 of those oxidation numbers

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