Butyric acid contains only C, \( H \) and O. A \( 4.24 m g \) sample of butyric acid is complete...

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Butyric acid contains only C, \( H \) and O. A \( 4.24 m g \) sample of butyric acid is completely burned. It gives \( 8.45 \mathrm{mg} \) of carbon dioxide \( \left(\mathrm{CO}_{2}\right) \) and \( 3.46 \mathrm{mg} \) of water. What is the mass percentage of each element in butyric acid?
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