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Starting in the ground state n = 1 is a hydrogen atom, an electronis excited to a higher energy level by absorption of 121.6 nmlight. What is the final energy state of the electron?
the decomposition of dinitrogen pentoxide is described by the chemical equation2 n2o5g ? 4 no2g o2gif the rate of
Chromatographic column, it is important to let the level drop in the column eluent to the level of the sand before applying the solution of the compound to be separated. What effect would have on the efficiency of separation ignore this recommenda..
On treatment of Compound D with an alcoholic solution of silver ammonium hydroxide, a silver mirror was formed within a few minutes. Identify the hydrocarbon A and Compounds B-D.
the volume of a sample of oxygen gas collected over water is 258 mL at 27 degrees C and 620.0 torr. Calculate the volume in milliliters of dry oxygen gas at STP. (the vapor pressure of water at 27 degrees C is 26.7 torr.)
Calculate the mass of silver chloride required to plate 245 mg of pure silver. Silver chloride, often used in silver plating, contains 75.27% Ag
Use the Henderson-Hasselbalch equation to calculate the pH of each solution: a solution that is 0.140 in propanoic acid and 0.125 in potassium propanoate.
Also, give an estimate the pl of this tetrapeptide (you may assume the pKa of any acidic R group is 4, the pKa of any basic R group is 11.5, and the pKa of the alpha-COOH is 2, and the alpha-NH3 is 9.5).
Describe how you will separate the following mixture of ions in solution. Use complete sentences and include all the details but be brief and concise in all your procedures. Include an explanation/rationale of the reagent used, etc.
If a solution is made from 100 g of pentane and 100 g of hexane, what will be the mole fraction of pentane in the gas phase over that solution (if only hexane and pentane vapor are present)? Assume no deviation from Raoult's law
Write the net redox reaction that occurs in the galvanic cell. (1 pt) Zn(s) | Zn2+(aq) (1.00 M) || Pb2+(aq) (1.00 M)| Pb(s)
Choose the selection which correctly identifies the forces which must be overcome to convert BH3 from a liquid to a gas.
Propanoic acid has a Ka of 1.4 x 10^5. If we make a solution 0.100 M in propanoic acid, what concentration of sodium propanoate should be added to give a buffer with a pH of 5.0?
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