How do you calculate molar mass?

Answer 1

You multiply the molar mass of the component element by how many of that atom appear in one molecule. You add all the elements' masses together to get the molar mass of the molecule.

For example, SO2

1 * mass of sulfur =32.1 g

2 * mass of oxygen =32.0 g

32.1 g + 32.0 g = 64.1 g

Answer 2

An element's molar mass is found on the Periodic Table, so you don't typically need to calculate it. It is calculated from the mass % of each of its different isotopes. To do that, you do this: (% of isotope 1)(mass isotope 1) + (% of isotope 2)(mass isotope 2) + (% of isotope 3)(mass isotope 3) + ... The "% of isotope" must be in decimal form - so, if it is 35%, you will be multiplying by 0.35.

Answer 3

if you know the chemical formula, multiply each elements atomic mass by its subscript and add all these together.

Answer 4

By dividing the total mass of the number of moles that you are considering by number of moles; the result is the molar mass.

Answer 5

Molar mass = Sum of the atomic weights of the contained elements.

Answer 6

Add all of the atomic masses together.