# How would you calculate the molecular formula of a compound?

##### 1 Answer

Feb 18, 2016

#### Answer:

Divide given molar mass, by "molar mass" which is calculated by you, multiply the answer with all your subscripts, voila

#### Explanation:

Its very simple actually

First, you need the empirical formula, for example, CH20, then you need, the molar mass of the compound,, which is probably stated in the question

Then, you find the "molar mass" of the compound which is given, CH2O, i.e, 12g/mol+2g/mol+16g/mol= 30g/mol

Then, divide the molar mass by the "molar mass" which YOU calculated

Now, this 5 which you have, multiply all the subscripts in your given empirical formula by 5

i.e

Thus, the molecular formula is