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Many fish which normally live in polar waters (where the water temperature is 0°C) die when the water in which they live warms up to 25°C. How many oxygen molecules are there in 1.00 mL of water at these two temperatures? How much does the oxygen content change when the water is heated? (What fraction or percentage is the smaller value of the larger?) Could this change in oxygen content explain why the fish die? Why or why not? (Henry's Law constants at 0°C are k(O2) = 2.54·104 bar, k(N2) = 5.45·104 bar; and at 25°C k(O2) = 4.40·109 Pa, k(N2) = 8.68·109 Pa.)
A 0.2758-g sample of a monoprotic acid neutralizes 74.0 mL of 0.07106 M KOH solution. Calculate the molar mass of the acid.
HClO is a weak acid (Ka=4.0x10-8) as well as so the salt NaClO acts as a weak base. Explain what is the pH of a solution that is 0.028 M in NaClO
A piece of sodium metal reacts completely with water as follows. 2 Na(s) + 2 H2O(l) 2 NaOH(aq) + H2(g) The hydrogen gas generated is collected over water
for analysis a short peptide seven residues long is treated with fdnb followed by complete acid hydrolysis and amino
An unknown metal sample is subjected to a beam of monochromatic light with a wavelength of 322 nm. Electrons are ejected from the metal surface with a velocity of 5.20 x 105 m/s. What is the threshold frequency of the metal?
a 90 antifreeze solution is to be mixed with a 75 solution to make 30 liters of an 80 solution. how many liters from
What role do carbohydrates play in the diet? How many grams of CHO are recommended for the brain to function on a daily basis
What is gel electrophoresis and what is the purpose of using an electrical current in this procedure?
Problem- Provide a mechanism for the removal of a Fmoc (9-fluorenylmethoxycarbonyl) protecting group from an amino group under basic conditions. Please draw the mechanism
In the purification of a mixture, what determines whether you use extraction or recrystallization as the initial procedure
How many moles of CO2 form when all of the butane is the lighter burns. How many molecules of gas form when the butane in the lighter burns completely
A solution of ethanol (C2H5OH) in water is prepared by dissolving 63.5 mL of ethanol (density = 0.79 g/cm3) in enough water to make 250.0 mL of solution.
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