What is the mole ratio of naoh to al(oh)3

The Molar ratio identify how many moles of product and reactant. are formed during a reaction.
Here, we have 1 NaOH and 3  Al(OH), which mean that the molar ratio of NaOH to Al(OH)3 is 1:3 (or 1/3)

Therefore, 1.2 moles of NaOH will produce (1/3) * (1.2) = 0.4 Moles of Al(OH)3

Hope this Helps :D