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Which of the following experimental observations best justifies Bohr's assertion that the energy of the electron in the isolated Hydrogen atom is restricted to certain allowed values (quantized)?
a. the discrete spectrum of Hydrogen
b.the schrodinger Wave equation
c.Electron diffraction
d.The photoelectron effect
e. the Pauli exclusion principle
not sure which actually proved it and can you explain why
Calculate the final temperature after the two substances are mixed together. The specific heat of water is 4.184 J/ g *c and the specific heat for silicon is 0.7121 J/ g*c.
The blue color of dextran blue solution is due to the well-known, blue complex formed between starches and iodine. If you only had the absorption spectrum of this solution
calculate the number of microstates, W, that have this energy. Make sketches of these microstates. Calculate the corresponding entropy for each state.
If the gas is an ideal gas, what pressure would develop in the can if it were heated to 475oC?
Name each of the following species for the following acid-base reactions. (The equilibrium lies to the right in each case, i.e., the product side is favored. If the species is an ion, include the word "ion" in the name.
Which of the following aqueous solutions produces the largest concentration of toal ions and what is the total concentration of ions. A) 1.5 m sodium sulfate B) 1.5 m magnesium sulfate C) 2.0 m lithium perchlorate D) 1.0 m magnesium phosphate
A box contains 126000 red marbles and 885000 yellow marbles. What sample size is required to reduce the sampling standard deviation of red marbles to 1.85%
the explosive tnt is composed of 37.0 carbon 2.2 hydrogen 18.5 nitrogen and the rest oxygen. if the molar mass of tnt
As a reaction progresses backwards toward equilibrium K is the highest value Q attains. e) A reaction with no products present has an infinite Q value.
Calculate the percent ionization of hydrazoic acid (HN3) in solutions of each of the following concentrations
draw a lewis structure of the molecule and indicate the number of bonds and orbitals used in bonding. Show electron configurations of the central bonding atom in both the unhybridized and hybridized states.
The first step of the Wittig reaction occurs through what kind of mechanism? A. acid-base B. SN2 C. rearrangement D. nucleophilic acyl substitution
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