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ARC-Challenge / Mercury_402216 / When an electric current is passed through water (H_2O) using a specific…

Problem

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question

When an electric current is passed through water (H_{2}O) using a specific apparatus, hydrogen (H_{2}) and oxygen (O_{2}) gases form. How can this reaction be shown in a chemical equation?

choices

H_{2}O -> H + O + H
2H_{2}O(l) -> 2H_{2}(g) + O_{2}(g)
H:O:H -> H_{2}O
H_{2}O(l) -> 2H(g) + O(g)

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Source and history

upstream_id / Original problem ID: Mercury_402216
task_id: 9ff9d3a2-da07-5c24-9810-4eeb3aa14193
task_key: ARC~2dChallenge--test--Mercury~5f402216
task_revision_id: 2
config / split: ARC-Challenge / test

Official source

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