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A protein may contain several cysteines, which may pair together to form disulfide bonds. If there is an even number n of cysteines, n/2 disulfide boons an form. Explain how many different disulfide pairing arrangements are possible?
an aqueous cacl2 solution has a vapor pressure of 81.1 mmhg at 50 c. the vapor pressure of pure water at this
Copper has two isotopes: Cu-63 (abundance = 69.2%, mass = 62.930 amu) and Cu-65 (abundance = 30.8%, mass = 64.928 amu). Calculate the (average) atomic mass of copper.
Which species exhibit hydrogen bonding. I. H3C - O - CH3 II. CH3 - CH2 - OH III. CH3 - CH2 - NH2
Melting point of a mixture A + B was measured to be higher than any of the melting points of pure individual components A and B. When this might be the case. (A possibility of an experimental error was excluded).
As the sample descended, the water pressure compressed the balloon and reduced its volume. When the pressure had increased to 75.0 atm, what was the volume of the sample? Assume that the temperature was held constant.
How many moles of NaOH are needed to react with 24.36 mL of 0.4921 M oxalic acid solution
there is a carbon phase diagram shown in the problem where there is a positive sloped curved line separating the
A researcher studying the nutritional value of a new candy places a 4.20-gram sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. The observed temperature increase is 2.71 °C
Assemble the alcohols (have the formula of C4H10) in the order of increasing reactivity with concentrated HCl.
The actual flow rate of blood into the lungs is roughly 5 L/min. Identify the assumptions made in the calculation of part (b) that are likely causes of the discrepancy between the calculated and actual blood flows.
The chlorine oxides, in which a chlorine atom is bonded to one or more oxygen atoms, are significant molecules in the chemistry of the atmosphere.
What amount of energy would be released upon formation of a mole of 28Si nuclei from their subatomic particles?
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