Which equation represents a conservation of atoms?

4) 4Fe + 3O₂ → 2Fe₂O₃

Explanation:

4Fe + 3O₂ → 2Fe₂O₃

In this equation the numbers of atoms are same in both side. There are four iron and six oxygen atoms are present on left and right side of equation. That's why atoms are conserved. This equation completely followed the law of conservation of mass.

Law of conservation of mass:

According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.

This law was given by french chemist  Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

The equation that represents the conservation of atoms is equation 4. That is .

Conservation of atoms can be described when the number of atoms on the product and reactant sides are equal for all the elements.

1.

Reactants : Iron = 2 atoms

Oxygen = 4 atoms

Products: Iron = 3 atom

Oxygen = 3 atoms

No conservation of atoms.

2.

Reactants : Iron = 2 atoms

Oxygen = 6 atoms

Products: Iron = 3 atom

Oxygen = 3 atoms

No conservation of atoms.

3.

Reactants : Iron = 4 atoms

Oxygen = 4 atoms

Products: Iron = 4atom

Oxygen = 6 atoms

No conservation of atoms.

4.

Reactants : Iron = 4 atoms

Oxygen = 6 atoms

Products: Iron = 4 atom

Oxygen = 6 atoms

Conservation of atoms.

Thus the equation that represents the conservation of atoms is equation 4. That is .

For more information about the conservation of atoms, refer to the link:

link

pie chart because it is in percents ( % )