A dilute solution of hydrofluoric acid has a volume of 3.0 L and a molarity of 3.0 M. If the original solution had a volume of 2.0L, what was the initial molarity?

4.5M

Explanation:

The solution was diluted from 2.0L to 3.0L, the dilution factor was:

3.0L / 2.0L = 1.5.

That means the solution was diluted 1.5 times.

As the final molarity of the diluted solution is 3.0M, the initial molarity of the solution was:

3.0M * 1.5 =

particle   p is an electron and particle q is a neutron