Question

Question #93523

Answer 1

The equation is already balanced

Explanation:

In terms of molecular format the equation is written as follows:

`CaCO_3` `rarr` `CaO` + `CO_2`

On the left hand side of the equation there are:

1 Calcium
1 Carbon
3 Oxygen

On the right side of the equation there are:

1 Calcium
1 + 2 = 3 Oxygen
1 Carbon

Therefore the left side equals the right side and is thus balanced.

Generally these summarized rules can be followed to balance equations:

1. Write the correct chemical formulas for all of the reactants and
   the products.

2. Write the formulae of the reactants on the LEFT of the reaction
   arrow; write the formulas of the products on the RIGHT of the
   reaction arrow.

3. Count the total number of atoms/ions of each element in the
   reactants and the total number of atoms/ions of each element in
   the products.

4. Balance the elements one at a time using coefficients.
   A coefficient is a small whole number that is written in front
   of a chemical formula in a chemical equation.

   It is best to begin with elements other than hydrogen and
   oxygen! These elements often occur more than twice in
   equations.

5. Check each atom/ion, or poly-atomic ion to be sure that the
   equation is correctly balanced.

6. Finally, make sure that all of the coefficients are in the lowest
   possible whole number ratios.

*Un-summarized rules for balancing found at: https://www.greenwichschools.org/uploaded/faculty/arleene_ferko/Unit_8_Notes_7_RULES_FOR_BALANCING_CHEMICAL_EQUATIONS.doc

Hope I helped :)