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When an enzyme is purified from a complex mixture of proteins what usually happens to the total amount of protein and the specific activity during the purification process? A. The total amount protein decreases and the specific activity increases. B. The total amount of protein and the specific activity both decrease. C. The total amount of protein increases and the specific activity decreases. D. The total amount of protein and the specific activity both increase. E. No change.
Calculate the number of lines per centimeter that should be etched in the grating for each of the following conditions:(a) A first order diffraction angle (?) of -27° for visible light of 600 nm wavelength
a radioisotope used to evaluate heart function in exercise stress tests, decays by capturing one of its own core electrons. it also emmits gamma rays. write an equation for its nuclear decay, then identify the daughter isotope
which equation best describes the average rate for the reaction shown. A (aq) + B 9aq) -----> C (aq) + D (aq) A. rate= [C] [D] / [A] [B] B. rate= - deltat/-deltaB C. rate= -delta[C]/delta t D. rate= -delta[A]/delta t E. rate= [A] [B]/ [C] [D]
what volume of hydrogen at STP is produced from the reaction of 50.0g of Mg and the equivalent of 75g of HCl?
For the cell reaction: Cu(s) + 2Fe3+ ? 2Fe2+ + Cu2+ Ecell° = 0.33 V What is the value of the equilibrium constant at 25°C for the cell reaction
You titrate a 0.1000 M solution of a strong base (NaOH) with a 100.00 mL solution of 0.1000 M Formic acid (Ka = 1.80 x 10^-4). Calculate the pH at the following points 100.0 mL of NaOH added
A list of the calorie content of foods indicates that a 10 oz chocolate thick shake contains 331 Calories. Express this value in kJ and in J
Assume that each hamburger needs three pickle slices. What is the smallest number of packages of buns, packages of patties, and jars of pickles, respectively? Express your answer as three integers separated by commas.
What is the percent by mass of NaHCO3 in a solution containing 10 g of NaHCO3 dissolved in 300 mL of H2O
For the first-order reaction, 2N2O---> 2N2 + O2, what is the concentration of N2O after 3 half-lives if 0.15 mol of N2) is initally placeed into in a 1.00-L reaction vessel
The reaction of 2,2-dimethyl-1-propanol with HBr is very slow and gives 2-bromo-2-methyl-propane as the major product. Give a mechanistic
the rate constant for the second order -reaction is 2NOBr(g)------>2NO(g)+Br2(g) is 48 L/mol*min at a certian temperture. How long will it take for 90.0% of a .0200M solution of NOBr to decompose.
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