A compound containing only carbon and hydrogen is analyzed, and is found to contain 20.11% hydrogen on a mass basis. How can the empirical formula of the compound be calculated?
We assume 100 g of hydrocarbon. The empirical formula is the simplest whole number ratio that defines constituent atoms in a species.
In 100 g hydrocarbon, there are
We then divide thru by the lowest ratio to give the empirical formula,
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