Question

What coefficients balance `Al(OH)_3 -> Al_2O_3 + H_2O`?

Answer 1

`2Al(OH)_3 rarr Al_2O_3 + 3H_2O`

Explanation:

On the the left side, there are `1Al, 3O, and 3H` originaly and `2Al, 4O, and 2H`. Since both sides need to have the same amount of each element, both sides need to have `2Al, 6O, and 6H`. This is why there are 3 water molecules, two `Al(OH)_3` molecules, and 1 molecule of `Al_2O_3` to have the equation balanced.