How to use right left harpoon arrow(⇌) symbol in LaTeX?

Symbol/Unicode	Right Left Harpoon Arrow/U+21CC
Type of symbol	Arrow
Package (requirement)	No
Argument	No
Latex command	`\rightleftharpoons`
Example	`\rightleftharpoons` → ⇌

One of the symbols used in chemical equation is the right-left harpoon arrow. You need to use the \rightleftharpoons command for this symbol in latex.

\documentclass{article}
\begin{document}
   \[ A + B \rightleftharpoons AB \]
   \[ N_2 + CH_2 \rightleftharpoons 2NH_3 \]
   \[ CO_2(g) + C(s) \rightleftharpoons 2CO(g) \]
\end{document}

Output :