срочноо
. Какие реакции эндотермические?
1) C + O2 → CO2
2) 4P + 5O2 → 2P2O5
3) 2KMnO4 → K2MnO4 + MnO2 + O2
4) S + O2 → SO2
5) 2KClO3 → 2KCl + 3O2
A) 1,2 B) 3,4 C) 3,5 D) 2,4 E) 1,4
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