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A nucleus in an excited state will return to its ground state, emitting a gamma ray in the process. If its mean lifetime in a particular exited state is about 6.35×10-12 s, explain what is the uncertainty in the energy of the corresponding gamma ray photon?And, explain what is the uncertainty in the frequency of the gamma ray?
Consider an electron constrained to travel in a '1-dimensional box' of length 4.510×10-9 m. Click here for more information on a particle in a box. Explain what is the energy of electron for the n=4 state?
Explain what is the wavelength of the photon emitted if the electron drops from the third excited state (n=4) to the ground state (n=1)?
Calculate the maximum non-expansion work per mole that may be obtained from a fuel cell in which the chemical reaction is the combustion of propane at 298K
Compute the amount of isopentyl acetate that must be present in the reaction mixture at equilibrium, on the basis the quantities of starting materials used.
What is the final concentration of (in M) 15.7 mL potassium hydroxide solution with an initial concentration of 1.553 M which is diluted with 15.6 mL of solvent? Assume the volumes are additive.
Bovine Serum Albunim (BSA) You need to make 100 ml of 2mg/ml BSA. Describe how you would dilute the stock solution to make this
Write a net ionic equation for the overall reaction that occurs when aqueous solutions of carbonic acid and sodium hydroxide are combined. Assume excess base.
3.5 g of a hydrocarbon fuel is burned in a vessel that contains 250. grams of water initially at 25.00 C. After the combustion, the temperature of the water is 26.55 C. How much heat is evolved per gram of fuel burned?
How does a solution of two volatile components with strong solute-solvent attractions deviate from Raoult's law?
How many grams of Hcl will be produced from the reaction of 50.0mL of a 0.300M CaCl2 according to the reaction:CaCl2 + H3PO4(aq) ----> Ca3(PO4)2 (s) + HCl (aq)
A 120 pound woman working in an office consumes about 2200 kcal/day, whereas the same woman climbing a mountain needs 3400 kcal/day.
what kind of intermolcular force exist for CH2CL2, CH3CH2CH2OH, H2O2, N2(l) It can be more than one
A 50.0-mL volume of 0.15 M is titrated with 0.25 M KOH. Calculate the pH after the addition of 20.0 mL of KOH.
The objective is to implement a menu-based system for Bank Accounts in order to simulate a very simple banking system. Many structures have to be declared to manage bank accounts.
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