Consider the molecule 2,2-dimethylpropane. Is it an isomer of 2-methylbutane?

Identify the structure that corresponds to the point “2” on the graph: I II III IV

Rank the following substances in order of increasing acidity: I acetone II 2,4-pentanedione III phenol IV acetic acid  

Sodium bicarbonate, NaHCO3, is the sodium salt of carbonic acid (H2CO3), pKa = 6.37. Which of thesubstances shown below will react significantly with sodium bicarbonate? I acetone II 2,4-pentanedione III phenol IV acetic acid

ALL the -OH groups are of a single orientation as shown in the molecule. What is that orientation?

What is valence electron count for the carbonate ion?

Sighting along the C2–C3 bond: identify the Newman projection of the most stable conformation. I II III IV

Draw the two possible chair conformations, and suggest a reason for the large energy difference. You may not be able to upload the drawing of the chemical structures and that is ok. Just write your reasoning using proper grammar.

What is the relationship (cis – trans) between blue colored OH and green colored OH.

Consider the molecule pentane. Is it an isomer of 2-methylbutane.