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Define An enzyme was assayed at an initial substrate concentration of 2x10^-5 M. In six minutes half of the substrate had been consumed. The km for the substrate is 5x10^-5M. Compute the turnover number (k)
suppose a can contains gas at a pressure of 755 mm Hg and a temperature of 25 degrees celsius, what would be the pressure if the can was heated to 1155 degrees celsius ?
The first-order reaction SO2Cl2 --> SO2 + Cl2, has a rate constant of 2.20 x 10^-5 s^-1 at 593 K. What percentage of the initial amount of SO2Cl2 will remain after 2.00 hours
Calculate the mass of nitrogen dissolved at room temperature in an 84.0 home aquarium. Assume a total pressure of 1.0 and a mole fraction for nitrogen of 0.78.
What color is lithium sulfate and lead chloride. Also are they soluble in water and alcohol? Are they flammable
Titanium (work function = 6.94 x 10^-19 J) and silicon (work function = 7.24 x 10^-19 J) surfaces are irradiated with UV radiation with a wavelength of 250 nm. Which surface emits electrons with the longer wavelength
1. at the interface of anetheraqueous solution colloidal cds nanocrystals assume theseare spherical self-assemble into
At what point during a titration of a weak acid with a strong base does the pH = pKa? What ratio would cause pH pKa & pH pKa
Estimate the enthalpy change for the combustion of one mole of ethanol (C2H5OH) using average bond dissociation enthalpies (in KJ/mol) for C-?H: 413, O-?H: 463, C-?O: 358, C-?C: 154, C=O: 122, and O=O: 498
Rank the following slightly insoluble compounds from the most soluble to the least soluble. CaCO3 Ksp = 2.8 x 10-9 Co(OH)2 Ksp = 1.6 x 10-15 CaF2 Ksp = 3.9 x 10-11 BaSO4 Ksp = 1.1 x 10-10
Sodium fluoride is added to many municpal water supplies to reduce tooth decay. Calculate the pH of a 0.00339 M solution of NaF at 25 degrees
nonbonding domains, polarity, intermolecular attractive forces, and which IMAF is the most important
a gas mixture with a total pressure of 770 contains each of the following gases at the indicated partial pressures 257
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