The statement for the empirical formula for C4H6 is "C2H3."
What is an empirical formula?
The empirical formula of an organic compounds is the lowest whole number ratio of atoms contained in the substance, as defined in chemistry. The empirical formula gives the minimal ratio of the number of various atoms that existing.
It's an empirical formula, if the formula is shortened, whereas not the exact number of atoms in the molecule, C4H6 is the chemical formula for butyne. For every mole of carbon, there are two moles of hydrogen. The carbon-to-hydrogen ratio equals 2:3. C2H3 is the empirical formula for butyne (C4H6).
Hence, the correct answer is C2H3.
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