Answer: The empirical formula is

Step-by-step explanation:
If percentage are given then we are taking total mass is 100 grams. So, the mass of each element is equal to the percentage given.
Mass of C = 62.04 g
Mass of H = 10.43
Mass of O = (100-(62.04+10.43)) g = 27.53 g
Step 1 : convert given masses into moles.
Moles of C =
moles
Moles of H =

Moles of O =

Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.
For C =

For H =

For O =

The ratio of C :H : O= 3: 6 : 1
Hence the empirical formula is
