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Assume that an atom has a radius r and the unit cell is cubic with a side length a. Find the number of atoms per unit cell and the packing fraction for a:
(a) Simple cubic structure, (b) Body-centered cubic structure, and (c) Face-centered cubic structure, (d) Diamond structure.
The packing fraction is the fraction of the volume of the unit cell that is inside the atoms, assuming the atoms are "hard spheres" and that they touch in the direction(s) of the shortest bond(s). Note that the size of the unit cell is determined by both the structure and r, so that there is a characteristic relationship between r and a for each structure. (Hint: the packing fraction is a number. It does not contain r or a.)
calculate the pH of the resultant solution: (a) 0.00 mL, (b) 5.00 mL, (c) 25.00 mL, (d) 45.00 mL, (e) 50.00 mL, (f) 51.00 mL.
Calculate the mass of each microstructure and the mass and composition of each phase within each microstructure. d.) Cool to 726 C. Sketch the morphology. Calculate the mass of each microstructure and the mass and composition of each phase within ..
Presume the peaks are caused by 12C and 13C isotopes determine the number of carbon atoms in the compound. Natural abundances- 12C is 98.93% and 13C is 1.07%
Magnesium has three isotopes, Mg-24, Mg-25, and Mg-26. The percentage abundance of each in order is 78.70%, 10.13%, 11.17%.
8.0 mL of 10.0 ppm fe 2+ solution is diluted to 100.o ml. What is the concentration (in ppm) of the resulting solution?
Predict whether each of the following groups will be o,p-, or m-directors in electrophilic aromatic substitution reactions: SCH3
The atmospheric pressure in La Grande (683 atmospheric pressure) is significantly lower than that of Portland
Calculate the value of K for the reaction at this temperature. Give your answer in scientific notation
Carbon dioxide dissolves in water and water evaporates into the atmosphere during the experiment. How do these two factors affect the results of your analysis in this experiment?
How many silver atoms are in a single nanoprisms with an edge length of 45nm and a length of 5 nm. the density is 10.5 g/cm3
The water level in a graduated cylinder initially at 220 rises to 279 after a piece of lead is submerged. What is the mass in grams of the lead.
A household refrigerator with a COP of 1.2 removes heat from the refrigerated space at a rate of 60 kJ/min. Determine the electric power consumed by the refrigerator and the rate of heat transfer to the kitchen air.
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