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лолка82
@лолка82
April 2022
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Закончите уравнений реакций горения:
Mn + ? = MnO ( валентность Mn - 5, O - 2)
? + O2 = BaO( валентнось 2 элементов = 2 )
N2 + ? = NO ( валенстно N = 1, 0=2)
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