Question

Which equation is a decomposition reaction?

Li2CO3 --Li2O + CO2
Zn + HCl -- ZnCl2 + H2
Na2O + CO2 -- Na2CO3
C6H12O6 + O2 --CO2 + H2O

Answer 1

Decomposition means a reactant is broken down. Therefore, the Li2CO3 equation is the correct one.

Answer 2

Answer:
`Li_2CO_3\rightarrow Li_2O+CO_2`

Step-by-step explanation:

Decomposition is a type of chemical reaction in which one reactant gives two or more than two products.

`A\rightarrow B+C`

1.
`Li_2CO_3\rightarrow Li_2O+CO_2` is an example of decomposition.

2.
`Zn+HCl\rightarrow ZnCl_2+H_2` is an example of single replacement reaction in which more reactive element displaces the less reactive element from its salt solution.

3.
`Na_2O+CO_2\rightarrow Na_2CO_3` is an example of synthesis reaction in which two reactants are combining to form one product.

4.
`C_6H_(12)O_6+O_2 \rightarrow CO_2+H_2O` is an example of combustion in which fuel is reacted with oxygen to form carbon dioxide and water.