Question

$2A{l}_2{O}_3\to A{l}_2{O}_3+2H_{2}O$ is a balanced chemical equation.

Answer 1

Reactant side:

Number of Atoms of Aluminium=4

Number of atoms of Oxygen=2

Number of atoms of hydrogen=0

Product side:

Number of Atoms of Aluminium=2

Number of atoms of Oxygen=5

Number of atoms of hydrogen=4

Since the number of atoms of different elements in the reactant side is not equal to that in the product side, the equation is not balanced

The correct chemical equation is

$A{l}_2{O}_3.2H_{2}O\stackrel{\Delta }{\to }A{l}_2{O}_3+2H_{2}O$