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One of the most famous of the obsolete theories of the hydrogenatom was proposed by Bohr. It has been replaced by quantummechanics but, by a remarkable coincidence (not the only one wherethe Coulomb potential is concerned), the energies it predicts agreeexactly with those obtained from the nucleus. The Coulombic forceof attraction,(Ze2)/(4πεor2), isbalnaced by the centrifugla effect of the orbital motion. Bohrproposed that the angular momentum is limited to integral values ofh-bar. When the two forces are balanced, the atom remains instationary state until it makes a spectral transition. Calculate the energies of a hydrogenic atom using the Bohr model.
Draw the two possible products of the reaction between benzaldehyde and ethylpropylketone
Assuming that DHo and DSo hardly change with temperature, determine the temperature in K at which the spontaneity of this reaction changes.
Hydrolysis of an ester using sodium hydroxide (2M) is usually a fast reaction. Why would it take almost 40 minutes to complete? It is imperative to consider the location of each reagent within the vial.
Find the concentration of Cu2+ in equilibrium with CuBr(s)and 0.10 M Br
The ballon ascends to and altitude where the pressure is 504 mmHg and temperature is -34degree celcius . What is the volume of the ballon at this altitude
This liquid is then diluted with water to form liquid .sulfuric acid, H2SO4, as the only product in the reaction. Write a balanced chemical equation for the formation of sulfuric acid from H2S2O7 when diluted with water.
Calculate the molarity of each of the following solutions. (a) 23.0 g of ethanol (C2H5OH) in 545 mL of solution (b) 15.4 g of sucrose (C12H22O11) in 74.0 mL of solution
Determine the partial pressure of each gas in a mixture of gases using Dalton's law of partial pressures
a sample of a mixture of kclo3 and kbr weighing 7.0950 g is heated in the presence of a small amount of mno2 which acts
Write the eqn for each large-extent B/L A/B rxn which occurred on making this mixture. Do this by starting with the rxn that involves the strongest B/L A with the strongest B/L B. Label this rxn (i). Continue writing eqns in this "strength order" ..
When the sodium atom becomes a sodium ion, how does the size and electron configuration of the sodium atom change?
Calculate the energy of an electron in a hydrogen atom when it resides in the n=3 level. State your answer in joules. plz show explanation along with answer
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