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.

10 Essay 5 points Please identify the following components for the element Selenium: 1 Chemical Symbol 2. Atomic Number 3. Family \# 4. Valence Electrons 5. Category Edit View Insert Format Tools Table

Which fermula represents an ionic compound? 1. \( \mathrm{H}_{2} \) 2. \( \mathrm{CH}_{4} \) 3. \( \mathrm{CH}_{3} \mathrm{OH} \) 4. \( \mathrm{NH}_{4} \mathrm{Cl} \)

Based on bond type, which compound has the highest melting point? 1. \( \mathrm{CH}_{3} \mathrm{OH} \) 2. \( \mathrm{C}_{6} \mathrm{H}_{14} \) 3. \( \mathrm{CaCl}_{2} \) 4. \( \mathrm{CCl}_{4} \)

Questão 2) Qual o valor da variação de entalpia da reação a seguir? \[ C_{(g r \text { fite })}+\mathrm{O}_{2(g)} \rightarrow \mathrm{CO}_{2(g)} \] Dados: \( \mathrm{C}_{(\mathrm{grffte})}+\frac{1}{2} \mathrm{O}_{2(g)} \rightarrow \mathrm{CO}_{(\mathfrak{g})} \quad \Delta H_{1}=-110,3 \mathrm{KJ} \) \( \mathrm{CO}_{(g)}+\frac{1}{2} \mathrm{O}_{2(g)} \rightarrow \mathrm{CO}_{2(g)} \quad \Delta H_{2}=-283,0 \mathrm{KJ} \)

5) \( \mathrm{Ag}_{2} \mathrm{O} \rightarrow \)