Answer:
3 ions are present in \((NH_4)_2CO_3\).
Explanation:
Ammonium carbonate is made up two ammonium ions and 1 carbonate ions.
1. Ammonium ion with valency of +1.
2. Carbonate ions with valency of -2.
By Criss-cross method we get:
\((NH_3)_2(CO_3)_1\)
When 1 mole of ammonium carbonate is dissolved in water it gives 2 moles of ammonium ions and 1 mole of carbonate ions.The chemical equation is given as:
\((NH_4)_2CO_3(aq)\rightarrow 2NH_4^+(aq)+CO_{3}^{2+}(aq)\)