Chemistry Questions and Answers February 21, 2020

Based on the approach/notation/data presented in lecture what is the appropriate chemical shift increment for group B that must be used in the process for predicting the chemical shift of proton H A ?

Group B I

Based on the approach/notation/data presented in lecture what is the appropriate chemical shift increment for group D that must be used in the process for predicting the chemical shift of proton H C ?

Group D Br

Based on the approach/notation/data presented in lecture what is the appropriate chemical shift incrementfor group F that must be used in the process for predicting the chemical shift of proton H E ?

Group F HE N.

Identify the structures of isomers A and B (molecular formula C9H10O). Compound A: IR peak at 1742 cm1; 1H NMR data (ppm) at 2.15 (singlet, 3 H), 3.70 (singlet, 2 H), and 7.20 (broad singlet, 5 H). Compound B: IR peak at 1688 cm1; 1H NMR data (ppm) at 1.22 (triplet, 3 H), 2.98 (quartet, 2 H), and 7.287.95 (multiplet, 5 H).

In the titration of 50.0 mL of 0.400 M HCOOH with 0.150 M LiOH, how many mL of LiOH are required to reach the equivalence point?

Doreen Schmidt is a chemist. she needs to prepare 32 ounces of a 15% hydrochloric acid solution. find the amount of 16% solution and the mount of 8% solution she should mix to get this solution?