1. The equation is not balanced. The balanced equation is [tex]4NH_3 + 5O_2 --- > 4NO +6 H_2O[/tex]
2. The equation is balanced.
3. The equation is not balanced. The balanced version is [tex]2H_2O --- > 2H_2 + O_2[/tex]
Balancing chemical equations
A balanced chemical equation usually has the same number of atoms of different elements in the reactants and the products, even though the forms of the atoms might have changed.
Consider the first equation: [tex]NH_3 + O_2 --- > NO + H_2O[/tex]
The number of hydrogen atoms is not balanced. Thus, the equation that shows balanced atoms of different elements would be: [tex]4NH_3 + 5O_2 --- > 4NO +6 H_2O[/tex]
Consider the second equation: [tex]N_2 + 3H_2 -- > 2NH_3[/tex]
There are 2 atoms of nitrogen in the reactants and there are also 2 in the product. The number of hydrogen atoms is 6 in the reactants and 6 in the products. Thus, it is a balanced equation.
Consider the third equation: [tex]2H_2O --- > H_2 + O_2[/tex]
There are 4 hydrogen atoms in the reactant and only 2 in the products. The balanced equation would be: [tex]2H_2O --- > 2H_2 + O_2[/tex]
More on balancing chemical equations can be found here: https://brainly.com/question/28294176
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