How to calculate molecular formula if only percentage composition is given?
Answers
u can use emperical formula method....
answer in attachment
The molecular formula of a compound denotes the actual number of atoms of different elements present in one molecule of the compound .
Now, first understand what empirical formula is .
The empirical formula of a compound is the simplest formula which gives the simplest ratio in whole numbers of atoms of different elements present in one molecule of the compound .
Percentage composition of a compound is the percentage by weight of each element present in it .
Steps to find the molecular formula of a compound:-
1. Calculate it's empirical weight from its empirical formula.
2 . Divide it's molecular weight by empirical weight ( n).
3. Multiply the empirical formula with n.
Now,
Molecular formula = Empirical formula× n
Check out the example in the attachment:
