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For a particle in a box system, by what factor do you need to change the box length to decrease the transition energy by a factor 5 for a fixed value of mass?
Which of the following combinations of peaks appears in the 1H NMR spectrum of diethyl ether, CH3CH2OCH2CH3? a. a triplet and a doublet b. a quartet and a sextet c.
Calculate the pH during the titration of 100.0 mL of 0.200 M HCl with 0.400 M NaOH. First what is the initial pH (before any NaOH is added
What are these Lewis Structures?
For a solution having 1.00 x 10^-3 equivalents/L total alkalinity (contributions from HCO3-, CO32- and OH-) at [H+] = 4.69 x 10^-11, what is the percentage contribution to alkalinity from CO32-
A student creates a coffee cup calorimeter for lab. The coffee cup contains 30 mL of water at a temperature of 55.5 °F. He then adds 65.4mL of water, at 165.5 °F, into the coffee cup. The final temperature of the coffee cup is 120.3 °F.
What is the coordination number of each sphere in a three-dimensional, close-packed array of equal-sized spheres
Calculate the molarity of your unknown, assuming it is monoprotic acid or monobasic base. Show all calculations for one titration with good precision including units and correct number of significant figures.
Substitution and elimination reactions are competing reactions. Under what conditions can you ensure that substitution will predominate
What molarity of aqueous aluminum sulfate solution can be expected to show the same conductivity
A solution is made by mixing 12.0 g of NaOH and 75.0 mL of .200 M HNO3. Write a balanced equation for the reaction that occurs between the solutes. Calculate the concentration of each ion remaining in solution. Is the resultant soluiton acidic or ..
What quantity of heat is required to change 40.0 g of ice at melting point to liquid water? The heat of fusion of ice is 335 J/g. The answer should be 13400 J Please include steps in solving
Write the complete electron configuration of lead (not the simplified condensed notation using the enarest inert gas)
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