Sketch Fischer projections of both (R)-2-chlorobutane and (S)-2chlorobutane.

Sketch the structures of the products acquired from reaction of cellobiose with the following:

(a) NaBH

(b) ${Br}_2, {H}_2 {O}$

Which of the other six D aldohexoses yield optically active aldaric acids, and which yield optically inactive aldaric acids? (See the previous problem.)

Previous problem:

D-Glucose yields an optically active aldaric acid on treatment with nitric acid, but D-allose yields an optically inactive aldaric acid. Discuss.

Calculate the amount of steric strain in each of the chair conformers of 1,1,3-trimethylcyclohexane. Which conformer would predominate at equilibrium?

1,1-dimethylcyclobutane and 1,1,3,3,5,5-hexamethyl cyclohexane staggered butane. Which of these structures has the most angle strain?

D-Glucose yields an optically active aldaric acid on treatment with nitric acid, but D-allose yields an optically inactive aldaric acid. Discuss.

Predict the outcome of the addition of HBr to

(a) 1-hexene;

(b) trans-2-pentene;

(c) 2-methyl-2-butene;

(d) 4-methylcyclohexene.

How many isomers can be formed in each case?

Convert the indicated tetrahedral representation of (S)-glyceraldehyde into a Fischer projection.

Which of these accounts would be present in the closing entries?

A. Dividends

B. Accounts Receivable

C. Unearned Service Revenue

D. Sales Tax Payable

Which of these accounts is never closed?

A. Dividends

B. Retained Earnings

C. Service Fee Revenue

D. Income Summary

Which of the following accounts is considered a temporary or nominal account?

A. Fees Earned Revenue

B. Prepaid Advertising

C. Unearned Service Revenue

D. Prepaid Insurance

A freely falling body has a constant acceleration of 9.8 m/s^2. This means that:

A. the body falls 9.8 m during each second
B. the body falls 9.8 m during the first second only
C. the speed of the body increases by 9.8 m/s during each second
D. the acceleration of the body increases by 9.8 m/s^2 during each second
E. the acceleration of the body decreases by 9.8 m/s^2 during each second

Reduction of L-gulose with ${NaBH}_4$ leads to the same alditol (D-glucitol) as reduction of D-glucose. Disucss.

Explain how you can account for the fact that reduction of D-glucose leads to an optically active alditol (D-glucitol), whereas reduction of D-galactose leads to an optically inactive alditol.