Question

What is the molarity of 20.0 grams of NaOH dissolved in 1.50 L of solution?

(NaOH Molar Mass! 39.997 g/mol)

Answer 1

Molarity = moles/litre
mol/L=g/(g/mol) (which is g times mols per g)

will give you mols then divide that by L to get mol/L

so
M=g x mol/g x L
M=(20 x 1 x 1.50)/39.997