Question

5. You have already seen how to calculate the number of moles given the mass of a

sample and its chemical formula. But can you calculate the number of moles in a liquid sample, given its volume and its chemical formula?
(Hint: you need an additional piece of information in addition to its volume. What is that
additional piece of information you need?)

Answer 1

The additional information needed is the molarity of the solution.

Step-by-step explanation:

Molarity is simply defined as the mole of solute per unit litre of the solution. It is represented mathematically as:

Molarity = mole /Volume

Mole = Molarity x Volume

From the simple illustration above,

If the molarity (mol/L or M) of the solution is known and the volume (L) is given, then, we can simply multiply the molarity and the volume together in order to obtain the number of mole in the solution.