p value

When chemical analysis is carried out, it turns out that the concentrations of many solutions are far below 1M, for example: 10-3M 3.10-9M etc.
To apply in an easy way such small concentrations, in chemistry we use the so called p values. Mathematically this means: -log; sign and number 10 is simply left out:

p..... = 3 means: [.....] = 10-3 mol/liter

It also happens that the substance itself is abbreviated; charges are left out, sometimes even more:

Now try (if possible) to execute action task A, to be found at the end of this module.