Exams & Certification

Calculate Delta H r x n for the following reaction: Fe2O3 (s) + 3CO (g)—–> 2Fe (s) + 3CO2 (g). Use the following reactions and given delta H’s. 2Fe (s) + 3/2O2 (g)—–>Fe2O3 (s), Delta H= -824.2 kJ CO (g) + 1/2O2 (g)—–>CO2 (g), Delta H=-282.7 K j The Correct Answer and Explanation is : […]

17) What is the (Delta Hrxn) for the reaction?a) -200.5 kJb) -2219 kJc) -3182.5 kJd) -2389.5 kJe) -2267.7 kJ 18) Based on the (Delta Hrxn) for the reaction, we can argue that:a) The reaction is exothermicb) The reaction is endothermicc) The system released a lot of energy and the surroundings did not absorb itd) The

Which of the following is a concurrent power granted to both the federal government and state governments? Establishing a postal system Levying taxes Printing money Regulating commerce between the states The Correct Answer and Explanation is : Correct Answer: Levying taxes Explanation: The U.S. Constitution divides governmental powers into three categories: expressed (or enumerated) powers,

Which of the following is a concurrent power held by both the national government and state governments? national defense issuing currency taxation chartering local governments foreign affairs The Correct Answer and Explanation is : Correct Answer: Taxation Explanation: The concept of concurrent powers refers to powers that are shared by both the national (federal) government

Which of the following statement is true?Answers A – DA If just one of the essential amino acid is missing from the diet, the body cannot synthesize new protein to replace that lost amino acid.B The lack of essential amino acids lead to positive nitrogen balance.C Most animal proteins contain non-essential amino acids.D. Human body

Which of the following statements is true of essential amino acids?Their recycling is different from that of nonessential amino acids.These amino acids are produced in excess within the body.These amino acids do not contain a side chain attached to the backbone.These amino acids cannot be made by the body The Correct Answer and Explanation is

Over many years, rainfall totals for Sacramento, CA in January ranged from a low of about 0.05 inch to a high of about 19.5 inches. The median was about 3.1 inches. Based on this information, explain how you can tell that the distribution of rainfall values in Sacramento in January cannot be bell-shaped. The Correct

technical machinist is asked to build a cubical steel tank that will hold 555L of water.Calculate in meters the smallest possible inside length of the tank. Round your answer to the nearest 0.01m. The Correct Answer and Explanation is : Solution: We are given a cubical steel tank that must hold 555 liters (L) of

A technical machinist is asked to build a cubical steel tank that will hold 230L of water.Calculate in meters the smallest possible inside length of the tank. Round your answer to the nearest 0.001m. What is the molecular geometry of SF4O? a. trigonal bipyramidal b. pentagonal c. square pyramidal d. tetrahedral e. trigonal planar The

The image below shows the reactions of the Beta-oxidation pathway. Label the enzymes on the diagram. (Note that enoyl-CoA hydratase is sometimes called enoyl-CoA hydrase, and acyl-CoA acetyltransferase is also called thiolase.) The Correct Answer and Explanation is : The β-oxidation pathway is a metabolic process that breaks down fatty acids into acetyl-CoA units, which