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!
1. Brookhaven National Laboratory (BNL) recently constructed the National SynchrotronLight Source II (NSLS-II), which provides the world's brightest coherent x-rays for studying materials and biological systems. Beamline 17-ID-2, the Macromolecular Crystallography Beamline, utilizes x-rays in the energy range 5.0 - 30.0 keV. What range of frequencies and wavelengths does this correspond to?
2. The High-Resolution Powder Diffractometer, beamline BT-1 at the National Institute for Standards and Technology (NIST), utilizes neutrons with a wavelength of 2.079 Å. The mass of a neutron is 1.67×10-27 kg.
a. Calculate the frequency and velocity of the neutrons used in this experiment.
b. Calculate the energy of the neutrons used in this experiment.
c. X-ray techniques are very powerful and often have better resolution than neutron experiments. However, there are sometimes concerns that the high energies associatedwith x-ray experiments can cause damage to sensitive biological samples, and you willoften read arguments that neutron experiments are a "more gentle" means of probing thestructure of sensitive materials. Compare the energy you calculated in part (b) for theNIST neutron diffractometer with the energies in the x-ray crystallography beamline from problem 1. Is this argument reasonable?
The succession of steps which review the best method for the preparation of p-isopropylphenol from benzene is
if 0.11 g of h2o2 decomposes in a 2.50 l flask at 25 degrees celcius what is the pressure of o2 and
1-hexanol was prepared by reacting an alkene with either hydroboration-oxidation or oxymercuration-reduction. Draw the structure of the alkene that was used to prepare the alcohol in highest yield.
The carbohydrate glyceraldehyde is shown below in several different Fischer projections. Sort the structures according to whether the Fischer projection represents glyceraldehyde
Calorimetry is a method used to measure changes in enthalpy, or heat, that occur during chemical processes. Two common calorimeters are constant-pressure calorimeters and constant-volume (or "bomb") calorimeters.
It is important that the flask used for molar mass determination is completly dry before adding volatile liquid unknown to it.why? what would happen to any droplets of wash-water remaining in the flask when the temperature of the flask is raised t..
suppose you wanted to dissolve 106g of na2co3 in enough h2o to make 6.00 l of solution.a. what is the molar mass of
a predict the order of elution of a mixture of biphenyl benzoicacid triphenylmethanol methyl benzoate from a silica
a solution consisting of isobutyl bromide and isobutyl chloride is found to have a refractive index of 1.3931 at 20 degrees celsius. The refractive indices at 20 degrees celsius of isobutyl bromide and isobutyl chloride
A titration of 60.0ml of 0.30M pyridine, C5H5N, required 90.0ml of 0.20M HCL to reach the equivalence point. What is the pH at this equivalence point. Kb(C5H5N)= 2.0e-9.
how does the chromatographic seperation ability of thin layer chromatography compare to seperation resolving power of
the percent by mass of bicarbonate in a certain alka seltzer product is 32.5. calculate the volume of c02 generated at
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