Explore BrainMass


Chemical Bonding

I have been having trouble figuring out how to do problems 8-10 in the attachment below. I completed the problems, but I would like to make sure that I have the correct answers and that I understand the solutions to the problems.

Band Structure Diagrams

See attached problem. I am having trouble on all parts of the problem. Any assistance would be appreciated.

Chemistry Problem Set: Half-Reactions

Please see the attached file for full problem description. 2. Which half-reactions represent oxidation and which reduction? Explain your reasoning. 2+ - a. Fe --> Fe + 2 e 4+ _ 2+ b. Ni + 2 e --> Ni - - c

Compounds & Structural Formulas, etc.

Please see the attached file for full problem description. A popular brand of low-fat shredded cheddar cheese advertises that it provides 1.5 g of fat with 15 Calories from total fat per serving. There are 50 Calories per serving and of the total fat, 1.0 g is saturated fat. A serving is defined as ¼ cup or 28 g. Is this "lo

Density, Conductivity, Coal-Combustion Calculations

Question 15: The density of liquid water at 0 degrees C is 0.9987 g/cm cubed; the density of ice at this same temperature is 0.917 g/cm cubed. a. Calculate the volume occupied at 0 degrees C by 100. g of liquid water and by 100. g of ice. b. Calculate the percentage increase in volume when 100. g of water freezes at 0 degree


1.) How many bonds are present in propene, C3H6? 2.) How many bonds are present in acetylene, C2H2?

Behaviour of phosphorus pentachloride (PCl5)

PCl5 is a white solid, which volatilises at 160oC and melts at 148oC under pressure. Molten PCl5 conducts an electric current readily. At 180oC PCl5 vapour has a density of 9.3 g/L corrected to the standard conditions. At 250oC a sample of PCl5 exerts a pressure, which is twice the expected value. Discuss these observations and

Peptide Bonds

Draw the peptide Asn-Val-Ile-Cys and list the number of peptide bonds and what type of peptide is it (dipeptide, tripeptide etc...)?