When ${\mathrm{Ag}}_2{\mathrm{CO}}_3$ is heated then product will be:

The reaction when ${\mathrm{Ag}}_2{\mathrm{CO}}_3$ is heated can be given as,

$2{\mathrm{Ag}}_2{\mathrm{CO}}_3\to 4\mathrm{Ag}+2{\mathrm{CO}}_2+{\mathrm{O}}_2$

Thus, the products are  $\mathrm{Ag},{ \mathrm{CO}}_2$ and ${\mathrm{O}}_2$