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a. Suppose we want a soln containing 150 micrograms of the protein at a concentration of .5 mg/ml. To do this we will first evaporate the liquid from enough of the protein soln to get 150 micrograms. How much coln do we need to start with? How much H2O do we add to get the desired concentration?
b. If the protein has a MW of 15000, express its initial concentration in micromoles/ml and in micromoles/microliters. If we want 2 micromoles of the protein for a rxn, how much of the original soln do we need?
c. Suppose we want 1 ml of a 10 microgram/ml soln. How much H2O and protein stock must we add to get this?
d. Suppose we want 100 microliters of .1 micrograms/ml soln. How much H2O and protein stock must we add to get this?
To what pH should a solution that is 0.075 M each in Ca2+ and Cd2+ ions be adjusted in order to best separate ions by precipitation of one of the hydroxides. What are the concentrations of the metal ions after the pH is adjusted to this value
If the earths average temperature is 288K,what fraction of the atmosphere absorbed infrared radiation? what is the temperature of this atmospheric layer? if this fraction increased 5% what would be the earths new average temperature?
Which has the highest vapor pressure?
It should shift to the right because the removal of a component causes the equilibrium to shift to the side from which the component was removed.
What is the sum of all the coefficients in the balanced equation?
Write the cell reaction and electrode half-reactions, and calculate the standard potential for each of the following cells: a) Pt|Fe3+(aq),Fe2+(aq)||Sn4+(aq),Sn2+(aq)|Pt
Carbon monoxide and oxygen both can bind to hemoglobin, an important molecule for oxygen transfer in our body. In addition, they compete in binding to this same molecule
Suppose that 266 mL of argon is collected over water at 25 ? C and 786 torr. Compute the volume of the dry argon at STP. The water partial pressure at 25 ? C is 23.8 torr. Answer in units of mL.
If you wanted to prepare a solution of CO in water at 25 degrees celsius in which the CO concentration was 2.2 mM, what pressure of CO would
Which of the intermolecular forces is the most important contributor to the high surface tension shown by water and What is the quantum of light called?
A 25.0 mL sample of river water was titrated with 0.0010 M Na2Cr2O7 and required 8.3 mL to reach the end-point. What is the chemical oxygen demand, in milligrams of O2 per liter, of the sample?
draw the molecule by placing atoms on a grid and connect with bonds for when the cyclopentane is exposed to Br2 in presence of light.
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