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Problem- A light emitting diode emits photons with an energy of 3.221 x 10^-19 J. What is the energy per mole of photons emitted. Ans. 1.94 x 10^5 J/mol.
Answer all three questions and provide required steps
Hemoglobin has a positive charge of +5 and a radius of 3.55 nm in water. How far will the protein travel in one hour in an electrophoresis gel at 25C when a field
Phosphorus-32 decays by beta emission to form sulfur-32. How many half-lives have passed in the reaction shown here
Using structural formula, write a balanced equation for the phosphoric acid catalyzed reaction of cyclohexanol to give cyclohexene.
Draw a formula for the lowest molecular weight compound that contains C, H, and possibly O, is a chiral compound, contains ONLY one functional group,
A buffer solution contains 0.5 M HA pka=8 and 0.25M NaA. What is the pH after 0.1 mol of HCL is added to this solution, giving a total final volume of 2L
A water solution contains molecule Z molecular weight 230 and NaCl. The solution is ionized with ESI method, as well as injected to a mass analyzer. In the collected mass spectrum what m/z peaks (value) might you expect to observe
Given that each neurotransmitter molecule that diffuses to the surface of an electrode releases two electrons. The average burst of charge measured at the electrode is 37fC. How many molecules are released in an average burst
For the reaction, calculate how many moles of the product form when 0.048 moles of O2 completely reacts. Assume that there is more than enough of the other reactant. 4Fe + 3O2 ---> 2Fe2O3
Problem- Rank these species by their ability to act as an oxidizing agent from best oxidizing agent to worse oxidizing agent.
NaOCl, by mass. Assuming that the density of bleach is the same as water, calculate the volume of household bleach that should be diluted with water to make 500.0 mL of a pH = 9.80 solution.
The enthalpy of combustion of benzoic acid (C6H5COOH) is commonly used as the standard for calibrating constant-volume bomb calorimeters; its value has been accurately determined to be 3226.7 kj?mol.
We burn 12.50L of ammonia in 20.00L of oxygen at 500 degrees celsius. What volume of nitric oxide, NO, gas can form. what volume of steam, H2O (g) is formed. Assume that all gases are at the same temperature and pressure, and that the limiting rea..
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