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Home Question Bank Chemistry Archive 2024 November 20

Chemistry Questions from Nov 20,2024

Browse the Chemistry Q&A Archive for Nov 20,2024, featuring a collection of homework questions and answers from this day. Find detailed solutions to enhance your understanding.

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Current Attempt in Progress If the core electrons were \( 100 \% \) effective at shielding the valence electrons from the nuclear charge and the valence electrons provided no shielding for each other, what would be the effective nuclear charge felt by valence electrons in: Mg Si e Textbook and Media Save for Later btención 1. Oxido mangánico 2. Oxido paládico 3. Oxido férrico 4. Oxido de Zinc 5. Oxido niqueloso Draw the following species (use VSEPR to draw the correct shape) and indicate the hybridization of the central atom in the following: (a) \( \mathrm{AsCl}_{3} \) (b) \( \mathrm{CH}_{2} \mathrm{O} \) (c) \( \mathrm{PCl}_{2} \mathrm{~F}_{3} \) (d) \( \mathrm{CCl}_{2} \mathrm{~F}_{2} \) (e) \( \mathrm{ICl}_{2}^{-} \) (f) \( \mathrm{IF}_{6}^{+} \) The deposition of aluminium is represented by the equation: \( \mathrm{Al}^{3+}\left(\right. \) eq \( +3 \mathrm{e} \rightarrow \mathrm{Al}_{(s)} \) The equation shows that: 3 F would deposit 1 mole of Al Practice Exercise 10.1 Solutions of zinc bromide and sodium hydroxide are mixed. How many moles of sodium hydroxide are required to for 0.033 mole of zinc hydroxide? 4. A piece of ice with a mass of 25 g is placed on the hot BBQ plate. The initial temperature of the ice is \( -10.0^{\circ} \mathrm{C} \). First it melts, and then boils into steam at \( 100^{\circ} \mathrm{C} \). Calculate the total heat energy absorbed by the ice as it is turned into steam (refer to the data on previous pages). For each of the following compounds, indicate if they are mainly ionic or covalent in nature, based on electronegativities: (a) \( \mathrm{MgCl}_{2} \) (b) \( \mathrm{BCl}_{3} \) (c) \( \mathrm{PCl}_{3} \) (d) \( \mathrm{ClO}_{2} \) (e) \( \mathrm{Na}_{2} \mathrm{~S} \) (a) \( \mathrm{CS}_{2} \) (a) NaH (b) HCl (i) \( \mathrm{SnCl}_{4} \) 2. Resuelva el ejercicio Teniendo en cuenta el ejemplo, calcule la densidad de una sustancia con una masa de 1.000 g y un volumen de 370 cm 3 . ¿De qué sustancia se trata? (1.0) 2. Escriba la reacción de esterificación que se da entre un ácido carboxilico de alto peso molecular y un alcohol, señale además en el éster, la parte que corresponde al ácido carboxilico y al alcohol. \( HCl + NaHCO _ { 3 } \rightarrow NaCl + CO _ { 2 } + H _ { 2 } O \)
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