What is the molarity of a NaOH solution, if 25.0 mL of this NaOH solution is required to neutralize 20.0 mL of 0.300 M H2SO4

True, the standard unit for volume is liters which can be represented by either a lower case "l" or a capital "l"

No is the answer to the question

So what you would do is go through and add 3 teaspoons(tsp) 6 times because of the 6 tablespoons(tbsp). which will give you an answer of 18. another way is to multiply 3x6=18.