Question

When the following chemical equation is correctly balanced, what will be the coefficient for N2H4? ___________N2H4 + ___________N2O4 ----------> ________N2 + _______H2OGroup of answer choices12345

Answer 1

`\text{ The number of moles of N}_2H_4\text{ is 2}`

Step-by-step explanation

Given that:

`\text{ N}_2H_4\text{ }+\text{ N}_2O_4\text{ }\rightarrow\text{ N}_2\text{ }+\text{ H}_2O`

To balance the above equation, apply the law of conservation of mass

The law of conservation of mass states that matter can neither be created nor destroyed but can be tranformed from on point to another.

The above law implies that the total number of atoms on the reactant side must be equal to the total number of atoms on the products side

On the reactant side, we have,

4 atoms of nitrogen

4 atoms of hydrogen

4 atoms of oxygen

On the product sides

2 atoms of hydrogen

2 atoms of nitrogen

1 atom of oxygen

To balance the equation, we have,

2 moles of N2H4

1 mole of N2O4

3 moles of N2

4 moles of water

`\text{ 2N}_2H_4\text{ }+N_2O_4\text{ }\rightarrow\text{ 3N}_2\text{ }+\text{ 4H}_2O`

In the new equation above, we have the following

on the reactants side

6 atoms of nitrogen

8 atoms of hydrogen

4 atoms of oxygen

on the products side

6 atoms of nitrogen

8 atoms of hydrogen

4 atoms of oxygen

Therefore, the number of moles of N2H4 is 2