Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Problem- 1) At what angle (in degrees) must {111} planes of platinum (Pt) be exposed to a collimated beam of thee X-rays in order to obtain by diffraction monochromatic CrKα radiation.
2) The molar energy of vacancy formation for silver (Ag), ?Hv, is 84 kJ/mol. Given this information, determine for Ag the vacancy density (number of vacancies/cm3) at 1103 K. Assume the pre-exponential factor is one.
3) A p-n junction is obtained at a depth of 3 x 10^-3 cm below the surface by diffusion of antimony (Sb) into p-type germanium. What is the donor concentration in the bulk germanium if the diffusion is carried out for three hours at 790 C? Express your answer in number of donor atoms per cubic centimeter. Assume the surface concentration of antimony is held constant at 8 x 10^18 cm-3 and that the diffusivity at 790 C is 4.8 x 10^-11 cm2/s.
Write your solution in appropriate format and provide references
A clinic took temperature readings of 250 flu patients over a weekend as well as discovered the temperature distribution to be Gaussian, with a mean of 101.40°F as well as a standard deviation of 0.5340. Explain use this normal error curve area ta..
An 11.0 gram sample of CO2 exerts a pressure of 50.0kPa. What mass of CH4 must be added to the CO2 in order to increase the pressure of 75.0 kPa? Assume no CO2 escapes.
complete and balance the following equations and identify the oxidizing and reducing agents. recall that o atoms in
Utilizing thermodynamic data from your notes, Compute the change in Gibbs free energy for each of the subsequent reactions using Gf's. In each case indicate whether the reaction is spontaneous under standard conditions.
Consider an unknown that is approximately 50.% KHP. What mass of the unknown would be required to react with 40. mL of 0.10 M NaOH?
The following reaction was carried out in a 2.25L reaction vessel at 1100 K: C(s)+H2O(g)---CO(g)+H2(g) If during the course of the reaction, the vessel is found to contain 10.0mol of C, 13.2mol of H2O, 3.40mol of CO, and 6.00mol of H2, what is the..
The boiling point of chlorform CHCL3 is 61.70 degrees C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in chloroform is aspirin
HFC's (hydrofluorocarbons) are replacing CFC's (chlorofluorocarbons) because the C-H and C-F bonds are stronger than C-Cl bonds. If the bond enthalpy of a C-F bond is 482 kJ/mol.
You need to prepare 100.0 mL of a pH=4.00 buffer solution using 0.100 M benzoic acid (pKa = 4.20) and 0.160 M sodium benzoate. How much of each solution should be mixed to prepare this buffer
What is the PH of the buffer that results when 12.0 g of NaH2PO4 and 8.00 g of Na2HPO4 are diluted with water to a volume of .50 L? (Ka of H2PO4=6.2*10^-8, the molar masses are 120.0 g/mol and 142. mol respectively.
Purification of nickel can be acheived by electrorefining nickel from an impure nickel anode onto a pure nickel cathode in an electrolytic cell
To find the mass of water use the density of water = 1.0 g/mL. I have looked at multipule different solutions that have already been worked but have not been able to get the correct answer no matter how many different ways i got about getting it.
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd