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A student wrote a chemical equation as shown.

4NH3 + 5O2 → NO + H2O

What should the student do to balance the equation?

Add a coefficient 7 before NO and a 7 before H2O.
Add a coefficient 5 before NO and a 7 before H2O.
Add a coefficient 4 before NO and a 6 before H2O.
Add a coefficient 6 before NO and a 5 before H2O.

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joseaaronlara

Answer:

The answer to your question is the third option

Explanation:

 Chemical reaction

                       4NH₃   +   5O₂   ⇒    NO +  H₂O

Count the number of elements in the reactants and products

                     Reactants        Elements    Products

                         4                         N                  1

                         12                        H                  2

                         10                        O                  2

All the elements are unbalanced

Let's add the following coefficients

                      4NH₃   +   5O₂   ⇒    4NO +  6H₂O

                     Reactants        Elements    Products

                         4                         N                  4

                         12                        H                  12

                         10                        O                  10

Now the reaction is balanced

Answer:

Add a coefficient 4 before NO and a 6 before H2O.

Explanation:

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