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(a) What experimental evidence is there for the electron having a "spin"?
(b) Draw an energy-level diagram that shows the relative energetic positions of a 1s orbital and a 2s orbital. Put two electrons in the 1s orbital.
(c) Draw an arrow showing the excitation of an electron from the 1s to the 2s orbital.
a 4.50-g sample of CaO is reacted with 4.34 g of H2O. how many grams of water remains after completion of reaction?
CaCN2 + 3 H2O → CaCO3 + 2 NH3 . How much CaCO3 is produced if 47.5 moles NH3 are produced?
Write a chemical equation for the acid-base reaction hat occurs when p-phentidine is dissolved in HCl. Why is HCl used instead of just plain DI water
calculate the ph of a buffer that is 0.158 m hclo and 0.099 m naclo. the ka for hclo is 2.9 x
You are about to perform a reaction that requires 1.25 mol of CaCl2 to go to completion. The solution available in the stock room has a concentration of 33 % w/v. How many mL of this solution will you need to use? A. 46 mL B. 420 mL C. 0.034 mL D...
A rigid tank contains 1.50 moles of an ideal gas. Determine the number of moles of gas that nust be withdrawn from the tank to lower the pressure of gas from 25atm to 35 atm.
draw two lewis structures for cl2o7 one with a chlorine-chlorine bond and one with a cl-o-cl arrangement of atoms.
Explain a compound decomposes by a first-order reaction. Explain the concentration of compound decreases from 0.1006M to 0.0810 M in 5.2min. Explain what fraction of the compound remains after 7.0 min
Explain what are advantages of preparing large volumes as opposed to small volumes when preparing a large aliquot of eluent vs a small aliquot? During TLC when you're preparing eluent define what are the advantages of making large volumes instead ..
What is the rate of the reaction if [A] is doubled? (b) Starting with the original concentrations, what is the rate of the reaction if [B] is doubled? (c) Starting with the original concentrations, what is the rate of the reaction if [A] and [B] a..
NaH2PO4 to make a buffer solution with a pH of 8.00?
100 mL of a buffer that consists of 0.20 M NH3 and 0.20 M NH4Cl is titrated with 25 mL of 0.20 M HCl. Calculate the pH of the resulting solution given that the Kb for NH3 is 1.8 x 10-5.
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