Question

What is the empirical fomula of fructose and caffeine

Answer 1

Explanation:

i). Chemical formula of the Fructose = C₆H₁₂O₆

Now, We can see that the whole number 6 is the multiple of the given chemical formula.

Now, 

Molecular Formula = n  × Empirical Formula,

C₆H₁₂O₆ = 6 × Empirical Formula

∴ Empirical Formula = CH₂O

(ii). Chemical Formula of the Caffeine = C₈H₁₀N₄O₂

The highest multiples of the given chemical formula is 2.

∴ n = 2

∴ Molecular Formula = n  × Empirical Formula,

C₈H₁₀N₄O₂ = 2 × Empirical Formula.

∴ Empirical Formula = C₄H₅N₂O.

Answer 2

Empirical formula of caffein is C8H10N4O2..