The size of a grain of salt can vary depending on how it is formed, but it is typically around 100 micrometres in diameter.
A water molecule is made up of two hydrogen atoms and one oxygen atom. It is much smaller than a grain of salt, with a diameter of about 0.3 nanometers.
To put it in perspective, a grain of salt is about 330,000 times larger than a water molecule.
Here is a table comparing the sizes of a water molecule and a grain of salt:
Object Diameter
Water molecule 0.3 nanometers
Grain of salt 100 micrometers