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How to synthesize using Malonic Ester
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- 25. Write reasonable mechanisms for each of the following transformations.Write a reasonable chain mechanism (mechanistic arrows, intermediates, etc.) for the following reaction. Your mechanism must be based upon currently accepted understanding of chemical reactions.Each of the following properties shows a regular trend inGroup 1A(1). Predict whether each increases or decreases upthegroup: (a) melting point; (b) E−E bond length; (c) hardness; (d) molar volume; (e) lattice energy of EBr.
- 10. The following Lewis structures for (a) HCN, (b) C3H;, (c) SnOz, (d) BF3, (e)HOF are incorrect. Explain what is wrong with each one and give a correct structure for the molecule. (Relative positions of atoms are shown correctly.) (a) H-ëN (b) HCC-H (c) 0-Sn-0 (d) :F B :F: (e) H-O-F:Oo.182. Subject :- Chemistry18. (a) Molecule N₂H4 (1) + 2 H₂O2 (1) → N2(g) + 4 H₂O (1) Complete the following table: Lewis Dot Structure (use dots or lines to show bonds) (b) (c) (d) N₂H4 H₂O2 N₂ H₂O Calculate the AH°rxn using average bond energies (Table 9.4 in textbook) Calculate the AH°rxn using the standard enthalpies of formation (Appendix 2 in textbook) Why are these two values slightly different?
- The breaking of the O-O bond in peroxydisulfuryl difluoride (FO,SOOSO,F) gives FO,SO: (FO2SO)2 2 2 FO2SO The compound on the left of this equation is a colorless liquid that boils at 67.1°C. Its vapor, when heated to about 100°C, turns brown as the product of the reaction forms. Suppose that, in a sample of the vapor, the intensity of the brown color doubles between 100°C and 110°C and that the total pressure increases only by the 2.7% predicted for an ideal gas. Estimate AH° for the preceding reaction.8:59 l LTE O AWhy are iron oxides in rocks evidence for prehistoric photosynthesis? (1 O Iron oxides form when oxygen, a product of photosynthesis, is in the atmosphere O Iron oxides form when cyanobacteria use carbon dioxide for photosynthesis. O Iron oxides form when carbon dioxide, a reactant of photosynthesis, is in the atmos O Iron oxides form when cyanobacteria produce oxygen via photosynthesis. O Type here to search escThe total amount Wunderhor Germany together and the us of enersy OF I mole (5. equal to a.) 18.01smol b.) the enthalpy of Formation C.) the themal comporents or the substanca d.) The tuctric enersy どりThe sum of the libvational erer)y, ro th tiohel ereisy, transitional elect onic enuray eversy ind mee wenery
- Chlorine dioxide gas (ClO2) is used as a commercial bleachingagent. It bleaches materials by oxidizing them. In thecourse of these reactions, the ClO2 is itself reduced. (a)What is the Lewis structure for ClO2? (b) Why do you thinkthat ClO2 is reduced so readily? (c) When a ClO2 moleculegains an electron, the chlorite ion, ClO2-, forms. Draw theLewis structure for ClO2-. (d) Predict the O—Cl—O bondangle in the ClO2- ion. (e) One method of preparing ClO2is by the reaction of chlorine and sodium chlorite:Cl2(g) + 2 NaClO2(s)------>2 ClO2(g) + 2 NaCl(s)If you allow 15.0 g of NaClO2 to react with 2.00 L of chlorinegas at a pressure of 1.50 atm at 21 °C, how many gramsof ClO2 can be prepared?Consider the following chemical reaction between component A and B: A(?) + 2B(g) → C(g)+ 3D(l) …..ΔH°r = −2253.2 kJ i. State whether the reaction is exothermic or endothermic. ii. Based on the value of heat of reaction, explain the chemical reaction above in terms of the energy associated with breaking or formation of molecular bonds. iii. Consider a similar reaction of A and B as the one shown above. However, the reaction now generates D in vapor form instead of liquid. Explain how the heat of reaction value differs from the one shown above. iv. If the above reaction occurs in an isothermal system where there is no work interaction and both kinetic and potential energy changes are too small such that they are negligible, write the energy balance for the system.Use the data found in Thermodynamic Properties to determine the values for the O-Cl and the O-F bond energies. (heats of formation of OF2 and OCl2 are 24.7 and 80.37 kJ/mol, respectively). Please see https://youtu.be/-OKWJ0LYdNc for assistance. DO-F kJ/mol DO-Cl kJ/mol
