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Consider the transitions involving only the n=1 through n=5 energy levels of the Bohr model of a hydrogen atom. Photons of the lowest energy level are emitted in a transition from the level with n=? to the level with n=?
A: n=4 to n=3
B:n=5 to n=4
C:n=3 to n=2
D:n=4 to n=2
E:n=3 to n=4
When 2.05 moles of a monoatomic ideal gas is reversibly heated at constant volume from 25 degrees celcius to 45 degrees celcius the entropy change of the system
Determine aqueous solutions of the following assume 1.0M concentration for each. Which would be more basic. Sodium sulfate or sodium methanethiolate?
Write a balanced net ionic equation for the reactions, if any, that occur between (a) FeS(s) and HBr(aq); (b) K2CO3(aq) and CuCl2(aq); (c) Fe(NO3)2(aq) and HCl(aq)
Octane is a liquid component of gasoline. Given the following vapor pressures of octane at various temperatures, estimate the boiling point of octane in Leadville, CO, where the atmospheric pressure is 496 mmHg. Various temperatures include: 400 mmH..
zinc has a standard reduction potential of -1.36 v for zn(oh)4 2- +2e- yields zn+4oh-. find the formation constant for zn2+ +4oh- yields zn(oh)4 2-
Use Coulomb's law to calculate the ionization energy in {\rm kJ/mol} of an atom composed of a proton and an electron separated by 80.0 pm
consider the following reactionpdos cog pds co2g kc4.0 x 103 at 1000kif a mixture of solid palladiumii oxide and
Explain how spectroscopy could be used by astronomers to assess the habitability of exoplanets and how it might be used to decide whether or not they could have an active biosphere.
the weak base methylamine is titrated with 0.10 M HNO3. Calculate the pH after 20.0 mL and 60.0 mL acid addition (HNO3).
the formula c6h12o6 is a source of many conversion factors. write at least three of them. how many moles of al atoms
A chemist has synthesized two new dyes based on the molecular structure of plant-based dye
Question- The standard free energy of formation of ammonia is -15.5kJ/mol. What is the value of K for the reaction below at 565.0K
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