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Suppose that the enzyme you are studying is regulated by phosphorylation. When the enzyme is phosphorylated, the Km for its substrate increases by a factor of 3, but Vmax is unaltered. At a concentration of substrate equal to the Km for the unphosphorylated enzyme, decided whether phosphorylation activates the enzyme or inhibits it. Explain your reasoning.
Calculate the lattice enthalpy (?Hl° in kJ/mol) of the MF2 metal fluoride using the following data: Bond dissociation enthalpy of F2(g) = 159 kJ/mol Electron affinity of F = -328 kJ/mol Enthalpy of sublimation of M = 123 kJ/mol First ionization en..
If 1700 cal of heat is added to a system while the system does work equivalent to 3000 cal by expanding against the surrounding atmosphere, the value of E for the process is
At constant pressure, 660 mL of nitrogen at 37°C are changed to 725 mL What is the new temperature of this gas?
in most general chemistry courses students calculate the molar mass mm of a volatile liquid using the ideal gas law pv
Aerosol cans have a label that warns the user not to use them above a certain temperature and not to dispose of them by incineration. Even an empty can contains residual gaseous propellant.
the two flask are filled with nitrogen gas and when both are immersed in boiling water the gas pressure inside the system is .5 atm. one of the flask is then immersed in an ice water mixture, keeping the other in the boiling water. calculate the n..
a reaction is begun with a reaction mixture containing the following dye 1.0 x 10-4 m bleach 0.10 m when dye 8.0 x
Given an unknown monoprotic(one hydrogen) acid. Make a 100 mL solution with 20% by volume. (mix 20 mL acid with 80 mL water) and titrate with NaOH. You must find the concentration of it the weak acid.
A process stream has 100 g/L NaCl in H2O. Prior to adding this to a batch bioreactor, the concentration must be reduced to 154 mM. The specific gravity of the solution is 1.075 at 20°C.
Suppose that 25 g of each of the following substances is initially at 28.0degrees C. What is the final temperature of each of the following substances upon absorbing 2.35 kJ of heat.
a beaker with 195ml of an acetic acid buffer with a ph of 5.000 is sitting on a bench. the total molarity of the acid
When X-rays with a wavelength of 154 pm (pm = 10^-12 m) are diffracted from an unknown crystalline compound, the first reflection occurs at theta= 4.24 What distance does that correspond to? (assume n =1)
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