How does knowing a molecular formula allow you to calculate molecular weight?

Answer:
Yes it does.

Ex.: C6H12O6 is glucose, or sugar. To find the atomic mass, you must add up all the masses of each element like so:

C=12.01 mol.g
H= 1.01 mol.g
O= 16.00 mol.g

(12.01 x 6) + (1.01 x 12) + (16.00 x 6) = 180.18 mol.g is glucose's atomic mass. This can be done with any compound if you have the empirical formula, and the weights for the elements found on the periodic table.
First answer by TheLizardLover. Last edit by TheLizardLover. Contributor trust: 3 [recommend contributor recommended]. Question popularity: 1 [recommend question].