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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.
200 mL of 0.150 M acid HA are mixed with 100 mL of 0.0800 M NaOH. Calculate the titration constant, kt, of the resulting reaction. Ka = 1.0 x 10^-5
Within the Bohr model of the hydrogen atom, the radius of the orbit for the ground state was 5.292 x 10-11 m. Using de Broglie's idea that the circumference of this orbit had to equal the wavelength of the electron
Which of the following molecules is polar?
How many liters of H2 gas, measured at 0.992 atm and 365 K, are required to synthesize 0.35 mol of CH3OH?
Calculate the heat release in KJ/g of the compound reacted w/ oxygen. The standard enthalpy of formation of C6H6 is 49.04 KJ/mol.
If a solution containing 47.307 g of mercury (II) acetate is allowed to react entirely with a solution containing 14.334 g of sodium sulfate, explain how many grams of solid precipitate will be formed
a) What is the structure of biacetyl? b) Indicate the hybridization of each carbon atom. c) How many pi bonds are present? d) Do the four carbon atoms lie in a plane or do they lie in a straight line?
Explain why, in 3 H spectra the relative intensities of lines within a triplet are 1:2:1. The signal for CDC3 I is a triplet with relative intensities of 1:1:1
Indicate whether or not each of the following compounds is soluble in water. If the compound is soluble, what ions are produced a. PbI2 b. Li2SO4 c. Fe(NO3)3
What mass of calcium can be produced by this process if a current of 6200 {\rm A} is applied for 35 {\rm h}? Assume that the electrolytic cell is 69 % efficient. also What is the minimum voltage needed to cause the electrolysis
suppose you have designed a new thermometer called the x thermometer. on the x scale the boiling point of water is 122
Describe the experiment(s) (as necessary), observations (as necessary), and results (as necessary) which would allow you to distinguish
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