How much of a substance is 18 * 10 ^ 23 water molecules?

The Italian scientist Amedeo Avogadro was most deeply and fully engaged in the amount of substance at the beginning of the 19th century. The result of his labors was a law named after him – Avogadro’s Law. This law and its consequences have an invaluable role in theoretical chemistry.

According to this law, one mole of a substance contains 6 * 10 ^ 23 structural units (molecules, atoms) of a substance. This number is at n.u. is the same for any substance. Subsequently, this constant was also named after the scientist.

Knowing the Avogadro number, you can easily calculate how many mole of a substance is a given number of molecules:

N = (18 * 10 ^ 23) / (6 * 10 ^ 23) = 3 mol

Answer: the amount of substance is 3 mol.