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Question- A crystal was analyzed using X-ray diffraction with radiation from a molybdenum source. The observed angle was 11.91°. Determine the distance between layers of the crystal. d= pm?
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calculate the energy (in kJ) of a photon which has a wavelength of a mircowave with a wavelength of 2.84 cm
If you had utilized 10 grams of calcium nitrate instead of 10 grams of sodium chloride for the boiling point elevation, explain how would the boiling point elevation have been affected
what antibiotic woiuld you put in an agar plate to ensure that the cells of a bacterial colony contain the plasmid withou an insert? c) which phenotype will indicate the presence of plasmids that contain human DNA fragments?
If the initial pressure of the ether is 135 torr, what is its partial pressure after 1420 s? (Note, since the volume and temperature don't change, the pressure is directly related to number of moles and so the pressure can be treated similar to co..
Calculate the following values for a 0.0150 M solution of NaH2A. and Calculate the following values for a 0.0150 M solution of Na2HA.
Calculate the concentrations of hydroxide and hydronium ions in a solution prepared by dissolving 0.308 g of solid NaOH in enough water to make 225 mL of solution. Kw = 1.0E-14. Hydroxide ion concentration
For a helium atom in a 1D box, calculate the value of the quantum number of the energy level for which energy is equal to 3/2 kT at 25C (A) for a box 1 nm long (B) for a box 10-6 m long.
write the rate law for each elementary reaction in the mechanism. D) if the first step is slow and the second one is fast, what rate law do you expect to be observed for the overall reaction.
A cylinder of helium has a volume of 8.00 L. The pressure of the gas is 388 lb in-2 at 25C. What volume will the helium occupy at standard atmospheric pressure (14.7 lb in-2) assuming there is no temperature change?
Dinitrogen pentoxide, (N2O5), decomposes by first order kinetics with a rate constant of (3.7E-5)s-1 at 298k how long will it take the concentration to decrease from 0.0233mol/L to 0.0176mol/L ?
Study of a first-order reaction, In the study of a first-order reaction, A--->B, it is found that A/Ao=0.125 after one hour. The system initially consisted of 0.20 mole of a gaseous A at 25 degrees C and 1 atm
A .117 gram sample of a metal reacts with hydrpchloric acid to produce 36.3mL od dry hydrogen gas. what is the equivalent weight of this metal.
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