Question

How many moles of sodium hydroxide are contained in 27 ml of 0.15 molar sodium hydroxide

Answer 1

Molarity is number of moles in 1L of solution.

You are given 27 cm3 i.e, 27ml solution. Convert it into literes first. 27ml =0.027L

Molarity = moles/volume of solution(L)

0.15= moles/0.027

Moles = 0.027* 0.15

Moles = 0.00405 of NaOH