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Problem 58

Propenoic acid, $\mathrm{C}_{3} \mathrm{H}_{4} \m…


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Problem 57

Valproic acid, used to treat seizures and bipolar disorder, is composed of $\mathrm{C}, \mathrm{H},$ and $\mathrm{O} . \mathrm{A}$ . $165-\mathrm{g}$ sample is combusted to produce 0.166 $\mathrm{g}$ of water and 0.403 $\mathrm{g}$ of carbon dioxide. What is the empirical formula for valproic acid? If the molar mass is $144 \mathrm{g} / \mathrm{mol},$ what is the molecular formula?


Empirical: $\mathrm{C} 4 \mathrm{H} 8 \mathrm{O}$ Molecular: $\mathrm{C} 8 \mathrm{H} 16 \mathrm{O} 2$ - see solution for work.



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Video Transcript

okay for this question. Firstly, we have to consider form love and in tow. C 03 x times edged tool We're the mask off compound ist 2.558 grams. When the compound is heated, all the water molecules are evaporated on. Only solid compound is left. Bitches ts off mass point 948 grams hands. The number off moles off compound taken is calculated by the tissue off mass. After heating, tow the mullahs mus, which gives us the number off mole that is 0.0 89 grounds. Second, the mass off water in the formula can be deducted by the total mass subtracting the mass off the compound, which is 1.61 grounds. Now the number off moles off water or calculated as mask off the compound. Definitely more Nicodemus. Given us, the number off moles equals 0.89 more. Thus, the number off moles off border in one mole of compound are 10

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