An organic compound on analysis was found to contain 54.2% carbon and 9.2% hydrogen by mass. What is its empirical formula?
A. CHO₂
B. CH₂O
C. C₂H₈O
D. C₂H₄O
To determine the empirical formula of the compound, we need to convert the given percentages of carbon (C) and hydrogen (H) by mass into moles and then find the simplest whole number ratio of these elements. Let's go through the steps:
Convert mass percentages to grams:
Assume we have 100 grams of the compound.
Mass of carbon (C) = 54.2 grams
Mass of hydrogen (H) = 9.2 grams
The rest would be oxygen (O) because it is the only other element possible in the given empirical formula options. So, mass of oxygen (O) = 100 grams - 54.2 grams - 9.2 grams = 36.6 grams So, the correct answer is D. C2H2O4
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