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When 6.889 grams of a hydrocarbon, CxHy, were burned in a combustion analysis apparatus, 20.17 grams of CO2 and 12.39 grams of H2O were produced. what is the empirical and molecular formula

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[tex] x^{2} x^{2} \sqrt{x} \left \{ {{y=2} \atop {x=2}} \right. \lim_{n \to \infty} a_n \leq \lim_{n \to \infty} a_n \left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right] \int\limits^a_b {x} \, dx \sqrt{x} x_{123} \leq \leq [/tex]

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