Moles and Molar Mass

[Riya Sood 4G]

What is atomic weight and molecular weight ? and do we have to calculate them? How?

[Kylie Lim 4G]

The atomic weight is the weight of just one atom, and you don't have to calculate it because it's given to you on the periodic table. The molecular mass is the mass of multiple atoms in a molecule and it can be calculated by adding atomic masses together.

[Patricia Chan 1C]

Atomic weight is quite literally the weight of an atom, and this is given on the periodic table so you won't have to calculate it yourself. As for molecular weight, this refers to the mass of a given molecule, which can contain many atoms. To find the molecular weight, you would add the atomic masses of the atoms that make up the molecule together. Hope this helps!