which choice shows the correct way to balance the equation

label Physics
account_circle Unassigned
schedule 1 Day
account_balance_wallet $5

H+O--------H^2O

1.H+H+O----H^2O

2. 2H^2+O^2------2H^2O

3.H+O----HO

4. H^2+O---H^2O

Apr 26th, 2015

2

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Apr 26th, 2015

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