A compound is made of 36.36% C, 7.13% H, 56.51% O. What is its empirical formula?

Its empirical formula : C₅H₁₂O₆

The empirical formula is the smallest comparison of atoms of compound forming elements.  

(empirical formula) n = molecular formula  

The principle of determining empirical formula and molecular formula  

Ar C = 12 g/mol

Ar H = 1 g/mol

Ar O = 16 g/mol

mol ratio of C : H : O =

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

2b2t

explanation:

2b2t