# Reactions Question

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[math]CH_4 + 2O_2 rarr CO_2 + H_2O[/math]

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The following chemical reaction occurred. What coefficient must be placed in front of water in order for the equation to be balanced?

[math]CH_4 + 2O_2 rarr CO_2 + H_2O[/math]

[math]CH_4 + 2O_2 rarr CO_2 + H_2O[/math]

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