Chemistry questions Essay Example | Topics and Well Written Essays - 1500 words

Chemistry questions - Essay Example-0.000533.4-1.49701E-05-0.00428127.70.0030.0000122.12833333-0.000538.5-1.2987E-05-0.00433173.30.00250.000012.88833333-0.000545.6-1.09649E-05-0.00439229.10.0020.0000083.81833333-0.000555.8-8.96057E-06-0.004483010.00150.0000065.01666667-0.000571.9-6.9541E-06-0.00464402.40.0010.00000396.70666667-0.0005101.4-4.93097E-06-0.00493575.60.00050.0000029.59333333-0.0005173.2-2.88684E-06-0.00577 pseudo-order rate constant = average of the rate constant (-0.00459)Section 312. Which of the transformations shown is a substitution answerA substitution reaction is one in which a functional group is replaced by another in a chemical reaction, functional group are a group of components within a jot that are responsible for chemical reactions, therefore the substitution reaction is A.13. Which of the transformations shown is an addition reactionAn additional reaction is one in which one or more molecules melt to form a new and larger molecule and this in turn redu ces the degree of unsaturation, they are the reverse of an elimination reaction, our answer is C.14. Statement 1 Reaction 17A will proceed faster than reaction 17B. (Assume the very(prenominal) concentrations of substrate and reagents.) BECAUSE Statement 2 Reaction 17A will proceed mainly via an SN2 mechanism whereas Reaction 17B will proceed mainly via an SN1 mechanism. D Both statements are true but Statement 2 is not a correct explanation of Statement 1.15. Statement 1 Reaction 18 will suffer product 18A rather than product 18B. BECAUSE Statement 2 Elimination by the E2 mechanism proceeds via an antiperiplanar conformation. You are asked first to decide whether each statement of the agree is true or false, and then, if both statements are true, to decide...The change of concentration of phenolphthalein (phth) with time is given in the table shown.A substitution reaction is one in which a functional group is replaced by another in a chemical reaction, functional group are a gro up of atoms within a molecule that are responsible for chemical reactions, therefore the substitution reaction isAn additional reaction is one in which one or more molecules combine to form a new and larger molecule and this in turn reduces the degree of unsaturation, they are the reverse of an elimination reaction, our answer is19. The following questions concern the molecules SF4 (central atom S) and BrF3 (central atom Br). In order to answer these questions, you will find it useful to use VSEPR theory to determine the shapes of SF4 and BrF3, and also to find the symmetry elements in both species and determine the point groups.23. Four reagents in the Key for Q32 are employed in a sequence of reactions (steps 1, 2, 3 and 4) to convert m-bromonitrobenzene into m-bromobenzoic acid (32). Reagents B and D are used for steps 1 and 2 respectively. In the spaces in the Key, type the appropriate labels of the two reagents close to suitable for steps 3 and 4.25.Select the most likely stru cture for the compound that gives rise to the 13C NMR spectrum with peaks at the following positions (given as /ppm) with the off-resonance