how many ml of 0.200m NAOH solution contain 2.00g NaOH(MW =40.00

1 answer

I will assume that 0.200m is a typo and you mean 0.200 M.
mols NaOH = grams/molar mass = ?
Then M NaOH = mols NaOH/L NaOH. YOu know mols and M, solvle for L and convert to mL.