What is the mass in grams (g) when given the molarity(M) and liters(L)?

Question

I am doing a review for my final and the book does not explain how to answer this problem.
EX:
Molarity=.024 (mol/L) of KOH
Liters= .064 L

Answer 1

KOH M= 56.106 g/mole

0.024 moles/liter = (0.024 moles*56.106g/mole)/L

= 1.3465 g/L

1.3465g/L * 0.064 L = 0.086 g

Answer 2

First multiply molarity and volume to obtain the # of moles. Then multiply the # of moles by the molar mass of KOH (56.10564 g/mol).
so 0.024 * 0.064 = 0.001536 mol
and 0.001536 * 56.10564 = 0.086 g

Answer 3

Try volume x molarity x Mr