# Question #c3e63

##### 1 Answer

The empirical formula is

Write down the ratio by mass C : F :O in grams:

163.8 : 518.1 : 145.4

Now work out the ratio by moles by dividing by the mass of 1 mole of each element. This is the

Ratio moles:

Divide through by 9.1 gives:

1.5 : 3 : 1

So x by 2 gives:

3 : 6 : 2

So the empirical formula is: