Pearson Savage
06/21/2024 · Elementary School

Données: \( \mathrm{C}=12 \mathrm{~g} / \mathrm{mol} ; \mathrm{H}=1 \mathrm{~g} / \mathrm{mol} ; \mathrm{V}_{\mathrm{m}}=22,4 \mathrm{~L}_{\mathrm{mol}} \mathrm{mol}^{-1} \) Tu es le rapporteur du groupe. 1-Donne la formule brute générale des alcynes. 2-Ecris l'équation bilan de la réaction d'hydrogénation d'un alcyne 3- Détermine: 3-1. La formule brute de l'alcyne A . 3-2.la masse \( \mathrm{m}_{\mathrm{B}} \) de l'alcane formé.

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1. La formule brute des alcynes est \( \mathrm{C}_n\mathrm{H}_{2n-2} \). 2. L'équation de la réaction d'hydrogénation d'un alcyne est \( \mathrm{C}_n\mathrm{H}_{2n-2} + 2 \mathrm{H}_2 \rightarrow \mathrm{C}_n\mathrm{H}_{2n} \). 3-1. La formule brute de l'alcyne A est \( \mathrm{C}_n\mathrm{H}_{2n-2} \). 3-2. La masse de l'alcane formé est \( 14n \, \text{g/mol} \).

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