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A solution transmittance is 35% at 260 nm. What will the solution absorbance be if you dilute 25.0 ml?
Orange juice can be modeled crudely as a misture of 8 g/L of citric acid (formally, 2-hydroxy-1,2,3-pro-panetircarboxylic acid; C6H8O7) and 1.6 g/L potassium ion. Find the equilibrium pH of orange juice
in the electrolysis of a sodium chloride solution, what volume of H2 is produced in the same time it takes to produce 257L of Cl2, with both volumes measured at 50 celcius degrees and 2.50atm
Compare the polarity of hexane, dichloromethane, ethyl acetate, acetone, and methanol for tlc (thin layer chromatography)
What constant current (in amperes) is required to produce aluminum by the Hall-Heroult
A 250.0-mL sample of water was adjusted to pH 10 with ammonia buffer and calmagite indicator was added. The prepared sample required 30.84 mL of 0.00802 M EDTA for titration to the endpoint. Calculate the hardness as ppm CaCO3
Calcium nitrate will react with ammonium chloride at slightly elevated temperatures, as represented in the equation Ca(NO3)2(s)+2NH4Cl(s)--->2N2o(g)+CaCl2(s)+4H2O(g)
Glass tempering can be accomplished by both thermal and chemical means. Each puts the near surface region of the glass piece into compression, thereby suppressing growth of surface cracks.
An ideal gas is contained in a cylinder with a volume of 5.0 102 mL at a temperature of 30°C and a pressure of 720. torr. The gas is then compressed to a volume of 25 mL, and the temperature is raised to 794.°C. What is the new pressure of the gas..
How many grams of water at 0 degrees C could be frozen to ice at 0 degrees C by the evaporation of 58.82 mol NH3?
Calculate the entropy change for the water, peroxide, and the entire system
What is the pKa for the pyridium cation. Pyridine + H2O Pyridium cation + OH- Kb = 1.71 *10^-9 A. pKa for the pyridium cation = 3.9 B. pKa for the pyridium cation = 5.2 C. pKa for the pyridium cation = 7.4 D. pKa for the pyridium cation = 8.8 E...
What us the partial pressure (in atm) of carbon dioxide and the partial pressure (in atm) of water vapor? (For the purpose of this question, assume ideal gas behavior.)
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