1 mole of any chemical substance will contain 6.02 times 10 to the 23 molecules of that substance.
This can be put to use for any three states:
The number of moles equals the mass in grams divided by the ‘RMM’, this can be summarised in the memory triangle. ‘M’, ‘N’, ‘A’ or Men never argue.
The number of moles equals the concentration of the liquid multiplied by the volume of the liquid, making sure that all measurements are in decimetres cubed. This can be summarised in the memory triangle. ‘N’, ‘C’, ‘V’ or Not a ‘CV’.
You can combine the two triangles to tell you how much substance to put in the liquid to make the solution.
The number of moles equals the volume of gas divided…