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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 reaction of methane and oxygen yields carbon dioxide gas and water. The unbalanced reaction is as follows: CH4(g) + O2(g)--->CO2(g) + H2O(g)
assuming that the atomspher is locally isothermal, the air density variation with pressure is giving by B=B0*(P/P0) where B is density ,p is pressure , and the subscript 0 denotes conditions at the earth's surface.
What mass of aluminum hydroxide can be made from 50 mL of 0.25M Al(NO3)3 and 100 ml of 0.1 M KOH
The value of deltaS0 for the following reaction is - 233J/K at 250C. What is the entropy of H2 (g) at 250C? C2H2 (g) + 2H2 (g) ----> C2H6 (g) a.131 b.204 c.102 d. 262
additioonal feat dexter and mandark team up in order toprevent the asteroids from destroying earth. they start
calculate the concentrations of the protonated and unprotonated forms of bromothymol blue in 100 ml of a ph 8.1 buffer
when phosphorus of 31 grams that mixes with o2 71 grams of phosphorus oxide is the product. determine the mass of
Tooth enamel is mainly hydroxapatite,Ca10(PO4)6(OH)2. If 1.117g of tooth enamel reacts with acid to give 1.111g of calicul chloride, what is the percentage of hydroxyapatite in the tooth enamel sample
Sodium methoxide reaction: Pipet 1.65 mL of a 25% (by weight) solution of sodium methoxide in methanol into a 10 mL reaction flask.
Pike's peak in Colorado is approximately 4,300 m above sea level. What is the boiling point of water at the summit and will a camper need longer or shorter time to cook food at the summit as compared to the cooking at the sea level
Why shouldn't you use a sample that has been melted andresolidified to confirm a melting point? e) A sample of an unknown compound has an melting point of145-154C. What conclusions would you draw? What actions would youtake?
You wish to prepare an HC2H3O2 buffer with a pH of 5.44. If the pKa of this is 4.74, what ratio of C2H3O2-/HC2H3O2 must you use. Calculate the pH of a buffer that is 0.058 M HF and 0.058 M LiF.
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