1 mole of an element or compound contains 6.20 times 10 to the 23rd power atoms or molecules of the element or compound. 1 mole of an element or compound has a mass equal to its mass number (or molecular weight) in grams. For example, 1 mol of hydrogen gas (H2) contain 6.02 times 10 to the 23rd power molecules and weights 2g. So what is the weight of 1 mole of pure sodium?
To find the weight of 1 mole of pure sodium, we need to know the atomic mass of sodium. The atomic mass of an element is the average mass of one atom of that element, taking into account the abundances of different isotopes.
The atomic mass of sodium is approximately 22.99 grams/mole. This means that 1 mole of pure sodium will have a weight of 22.99 grams.