Ответ:
2Pb + O2 = 2Pb; 2Ag + S = Ag2S; 4K + O2 = 2K2O; H2 + F2 =2HF; 4Li + O2 =2Li2O; 4B + 3O2 = 2B2O3.
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Ответ:
2Pb + O2 = 2Pb; 2Ag + S = Ag2S; 4K + O2 = 2K2O; H2 + F2 =2HF; 4Li + O2 =2Li2O; 4B + 3O2 = 2B2O3.