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What is the oxidation number for H2O

User Ollb
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For H2O, the hydrogen has an oxidation state of +1 and oxygen has an oxidation state of -2. Overall, for one molecule of water, H2O→ for H, 2 x (+1) = 2; for O, 1 x (-2) = -2; overall, (+2) + (-2) = 0, giving water a net oxidation state of zero.

User MYjx
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