I need help with this chemistry question

Question

How many moles are in 80g of NaOH?

Answer 1

The molar mass of NaOH is 40 g/mol.

40 g = 1 mole

80 g = 2 mole

etc.

To do it by dimensional analysis, you would set it up as follows:

80 g NaOH x 1 mol/40 g = 2 moles NaOH