Other Chemistry Answers

Draw the following: Show all atoms.

A. Fischer projections of the linear structures of both the D and L enantiomers of glucose. On

these structures indicate how the D-enantiomer is distinguished from the L-enantiomer.

B. Haworth projections of both anomers that can form when D-glucose cyclizes in water.

Indicate the anomeric carbon. Name these anomers and explain how they are named.

C. Haworth projection of β-D-fructose. Explain why this sugar is referred to as a ketohexose

sugar and a furanose sugar.

The half-lives of different radioisotopes are given in the table.

Radioisotope

argon-44

lead-196

potassium-44

indium-117

Half-life (min)

12

22

43

How long would it take, in minutes, for the amount of indium-117 to decrease from 28.0 mg to 3.50 mg?

a solution contains 7.0 nonvolatile nonelectrolyte solute in 700g acetic acid at 150c determine the mm of the solute

What is the exact mass in Dalton, mass errors in ppm, estimated carbon number from isotopic abundance and ionic formula for the flw ESI MS peaks m/z: 104.3, 117.8, 155.9, 258, 276,296.2, 309, 542.9,705.6 and 867.1