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- Which are the major products of the reaction below? OH CI OH CI OH CI (A) (B) (C) (D) Compounds A and B Compounds A and C O Compounds C and D Compounds B and DThe reaction below is: * hy Cl2 2 :CI-Trimethylamine, (CH3)3N, is a common reagent. It interacts readily with diborane gas, B₂H6. The latter dissociates to BH3 and this forms a complex with the amine, (CH3)3N→BH3. The reaction between trimethylamine and borane is shown. CH3 CH3 H CH3-N : + B-H CH3-N B-H CH3 H CH3 H Is the BH3 fragment a Lewis acid or a Lewis base? To decide this, answer the following questions: H a Which of the following is a definition of a Lewis acid? proton donor electron pair acceptor proton acceptor electron pair donor
- 1-Methyl-1,3-cyclopentanediol Draw the molecule by placing atoms on the grid and connecting them with bonds. You do not need to show hydrogen atoms connected to carbon atoms. Y [] C H ON S P F Br ♡ CI 1 X ? MoreAcetic acid, CH3 COOH, is a weak organic acid, pK a 4.47. Determine the position of the equilibrium for the reaction of acetic acid with NaHCO3, and draw the species that predominate at equilibrium. • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. •Separate structures with + signs from the drop-down menu. • Draw cations and anions in separate sketchers. Do not include metal counter-ions, e.g., Nat, in your answer. 0- ● [... / ? ChemDoodle Ⓡ Y Sn [FPlease answer # 7 and if you are able to answer the second from # 6 (12gKClO3)
- What is the final product (B) of the following reaction? CH3 Br2 1. KCN light → B 2. H30*, heat CH3 CO2H CO,H CH3 CH2CO2H (a) (d) `CO2HUse and modify some/all the reactions provided to form the indicated overall reaction according to Hess' Law. • If a reaction is not used in your Hess' Law process, include that indication by multiplying the reaction by "0" • If no modification is needed and the reaction is applied as written below, include that indication by multiplying the reaction by "1" • Use whole numbers and simple fractions (such as "2" or "1/2", not 0.5) and negative signs (such as "-2") where needed Then calculate and report the enthalpy change (in kJ) for the overall reaction in the indicated blank, including units with your written value and rounded to 1 decimal place. Overall Reaction: CS2(1) + 302(g) → CO2(g) + 2SO2(g) Rxn # Reaction ΔΗ° (kJ) 1 C(s) → C(g) 716.67 2 C(s) + O2(g) → CO2(g) -393.5 3 3Fe(s) +202(g) → Fe3O4(s) -1118 4 C(s) + 2S(s) → CS2(1) 87.9 5 CH4(g) + O2(g) → CO₂(g) + H₂O(g) -882.0 6 S(s) + O2(g) → SO2(g) -296.8 N2(g) + 4H2(g) + Cl2(g) → 2NH4Cl(g) -629.1 7H₂C=CH3 H₂ Lindlar's catalyst Classify the following reaction as: addition, elimination, substitution or rearrangement. H H3C H Question 34 of 50 CH3 K F7 80 DII 5 : F8 A) substitution B) elimination C) addition D) rearrangement F10 4 F11 F12 Submit + 100% EN
- Which reactions have a positive ASXN? 2 A(g) + 3 B(g) 4C(g) O 2 A(g) + B(g) C(g) 2 A(g) + B(g) 4C(g) 2 A(g) + B(s) 3 C(g) 全Estimate the heat released when ethene(CH2=CH2) reacts with HBr to giveCH3CH2Br. Bond enthalpies areC-H : 412 kJ/mol; C-C : 348 kJ/mol;C=C : 612 kJ/mol; C-Br : 276 kJ/mol;Br-Br : 193 kJ/mol; H-Br : 366 kJ/mol. Choose the correct answer:1. 1036 kJ/mol2. 58 kJ/mol3. 424 kJ/mol4. 200 kJ/mol5. 470 kJ/mol(Q93) Which of the following best describes how a catalyst speeds up the rate of a reaction? O By decreasing the activation energy required to form the transition state O By decreasing the enthalpy difference between products and reactants O By removing the transition state Through acting as a supplemental reaction substrate O By ensuring that the reactant molecules do not collide