The empirical formula of Vitamin B5, also known as niacin or nicotinic acid, is determined based on its percentage composition by mass: 58.4% Carbon, 4.09% Hydrogen, 25.99% Oxygen, and 11.38% Nitrogen. Assuming a 100g sample of niacin, the mass of each element can be calculated, leading to the determination of moles for Carbon, Hydrogen, Oxygen, and Nitrogen. It is important to note that niacin is often confused with Vitamin B3, although this minor error does not impact the empirical formula calculation.
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