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At room temperature (20 degrees Celsius), milk turns sour in about 64 hours. In a refrigerator (3 C) milk can be stored 3 times as long before it sours.a) Approximate the activation energy of the reaction that causes the souring of milk.
b) Explain how long should it take milk to sour at 40 C
The resulting solution freezes at 26.5 oC. If Kf for the solvent is 1.74 o C/m then determine the molar mass of the nonelectrolyte compound?
An unknown foul smelling hydrocarbon gives the mass spectrum and infrared spectrum with a major fragment at 39, 67, 81, and 95. propose structures for the major fragments
a piece of sodium metal reacts completely with water as follows.2 nas 2 h2ol 2 naohaq h2gthe hydrogen gas generated
What is the electron configuration for Cr3+. Also, I need explanation as to how the d orbital works. Why does it go from 4s2 to 3d
How many moles of MnO4 - ions are required. How many moles of Fe2+ are there in the sample. How many grams of iron are there in the sample. What is the mass percent of Fe in the sample
Calculate the molar concentration of OH- ions in a 7.5×10^-2 M solution of ethylamine C2H5NH2(Kb = 6.4x10^-4).
What volume of 0.100 M NaOH is needed to make 100.0 mL of a buffer solution with a pH of 6.00 if one starts with 50.0 mL of 0.100 M potassium hydrogen phthalate?
How many grams of liquid sodium (minimum) are needed to absorb 4.70 MJ of energy (in the form of heat) if the temperature of the sodium is not to increase by more than 10.0 °C?
What is the theoretical yield of aspirin if 153 kg of salicylic acid is allowed to react with 179 kg of acetic anhydride?
question how many stereoisomers are possible for ch2cl2 provided that the central carbon has a square planar
Calculate the specific heat of a metallic element if 314 joules of heat energy are needed to raise the temperature of a 50.0 gram sample from 25 degrees celsius to 50 degrees celsius.
The pka of the carboxyl group is 3.0. you have 500liters of 0.1 M acetylsalicylic acid. how much solid sodium hydroxide has to be added to convert all of the acetylsalicylic acid into sodium acetylsalicylate
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