The balanced equation shows the reaction between aluminium hydroxide and hydrochloric acid to form aluminium chloride and water: Al(OH)3 + 3HCl = AlCl3 + 3H2O. 1 mole of aluminium chloride was formed, what mass of aluminium hydroxide was formed?
I'll assume you mean what mass of aluminum hydroxide reacted.
We can use the coefficients of the equation to determine the number of moles of
which makes sense given their molar ratio is
Now, we can use the molar mass of aluminum hydroxide (
which I suppose will round to