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2014-05-24T16:30:41+03:00
Cel mai inteligent răspuns!
2014-05-24T16:35:22+03:00


4Al+2O2= 2Al2O3

Ag+Cl2=AgCl2

4Fe+3S=Fe4S3

S+2O2=SO4

2Cu+O2=2CuO

4Cr+O2=2Cr2O3

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