Final answer:
The compound with the given atom combining ratios of C:H:O as 3:8:1 has the empirical formula C3H8O.
Step-by-step explanation:
The compound with atom combining ratios of Carbon: Hydrogen: Oxygen = 3:8:1 has the empirical formula of C3H8O. The formula represents a compound that contains 3 carbon atoms, 8 hydrogen atoms, and 1 oxygen atom in the simplest whole number ratio. Empirical formulas provide the relative number of atoms of each element in a compound.