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1. Lead (at room temperature) has FCC crystal structure. If the atomic diameter of lead is 0.35 nm and the atomic weight is 207.2 g/mol, calculate the density of lead. Compare the result to literature values and discuss the possible origin for any deviation. Crystalline solids:
1. a) Name and briefly explain three major types of defects that can be observed in crystalline solids.
2. b) Why do defects result in an increase of the energy of a material?
3. c) Experimentally it is observed that atoms that are located along grain boundary defects are more reactive that atoms that are located within a crystal grain. Briefly explain the origin for this observation.
Problem- Assign the 13 electrons in BO to appropriate bonding and antibonding orbitals. 1) What is the bond order of the bond in BO
Describe briefly the trend in the stabilities of oxidation states within d-metal? [High and low oxidation states]
calculate the mass of nitrogen dissolved at room temperature in an 99.0 rm l home aquarium. assume a total pressure of
Hind +h2o ind- + h3o+ When a few drops of methyl red are added to 1.0M HCL what is the color of the resulting solution
In the concentration range of 500 to 2000 ppm of U, there is a linear relationship between absorbance at 351.5 nm and concentration. At lower concentrations the relationship is nonlinear unless about 2000 ppm of an alkali metal salt is introduced ..
The molar heat capacity of silver is 25.35J/mol*C . How much energy would it take to raise the temperature of 11.9g of silver by 11.6C
Give a set of four quantum numbers that correspond to an electron in the highest occupied atomic orbital of Indium.
Calculate the pH at the points in the titration of 40.00 mL of 0.425 M NH3 for the reaction below. NH3(aq) + HNO3 ? NH4+(aq) + NO3?(aq) For NH3, Kb = 1.8x10-5. Enter your answer with 2 decimal places. Enter scientific notation as 1.23E4. (a) When ..
What chemical reaction (formula) is involved in the thermal decomposition of ammonium persulfate (NH42S2O8)
250-ml erlenmeyer flask : Contains 20.0 g sucrose, 2.0 g yeast, 175 ml DI water, and 20.0ml Pasteur's salts. The flask is fit with a one-hole rubber stopper with a glass tube leading to a beaker. Determine theorectical yield in grams and milliters ..
A container holds 355mL of a mixture of nitrogen and carbon dioxide gases. Compute the partial pressures of each gas if the container is at 27.3 degrees C.
write the most stable lewis structure for C2F4 and state the hybridization of the carbon atom
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