How would you find the molecular formula from the empirical formula?
Let's say you have a compound which contains nitrogen and oxygen.
Experimental evidence reveals that the ratio of nitrogen to oxygen is 1:2, so the empirical formula would be
The mass of
If additional experimental evidence reveals that the molar mass of the same compound is 92g/mol you would need to multiply the empirical formula by 2 to get the molar mass of the compound.
2(14 + 16 + 16) = 92
Doubling the empirical formula will give a molecular formula of
Here is another example:
Video from: Noel Pauller
Hope this helps!