BalanceRedoxRxn01

Multiple choice question
The following electrochemical data may be helpful in answering the question below.

Magnesium reacts with nitric acid to form magnesium nitrate and nitrogen monoxide in an acidic aqueous solution. Write the balanced equation for this reaction.

wrong3Mg + 3HNO3 3Mg(NO3)2 + 2NO
wrongMg + 3HNO3 + H3O+ Mg(NO3)2 + NO + 3H2O
wrongMg + 4HNO3 Mg(NO3)2 + 2NO + 2H2O
correct3Mg + 8HNO3 3Mg(NO3)2 + 2NO + 4H2O
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