General Chemistry Answers

1. Although oxygen does not participate directly in the citric acid cycle, the cycle operates only when O2 is present. Why?

2. List the five coenzymes involved in decarboxylation of pyruvate by PDC.

3. How does the citrate synthase prevent the wasteful hydrolysis of acetyl CoA to acetate and CoA?

4. What is the ratio of the total number of the lipoyl groups of the E2 core in E. coli PDC to that of mammals?

5. British anti-lewisite (BAL), which was designed to counter the effects of the arsenical war gas lewisite, is useful in treating arsenic poisoning. Explain

Gallium has two naturally occuring isotopes with mass numbers 69 and 71 respectively.What is the percentage abundance of both isotopes if their relative atomic mass is 70.59

Kp of PH3BCl3

21. Two of your friends, Rex and Cody, are having a disagreement. Rex argues that 0.020 M HCl is more acidic than 5.0 M CH3CH2COOH (pKa = 4.87) because nitric acid is a strong acid. Cody argues, however, that 5.0 M CH3CH2COOH (pKa = 4.87) is more acidic than 0.020 M HNO3 because it has a higher concentration. Who is correct? Prove your point by calculating both pHs.

Discuss the entropy of free compression process.How does temperature remain constant during a phase transition . Explain with the example of suitable system.