Odpowiedź:
Wyjaśnienie:
2CU+ O2=2CUO
4FE+ 3O2=2FE2O3
2Ca+O2= 2CAO
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Odpowiedź:
Wyjaśnienie:
2CU+ O2=2CUO
4FE+ 3O2=2FE2O3
2Ca+O2= 2CAO