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Consider a completely unstructured dna chain of length 5200 base pairs. Based on a random walk model, the root mean square distance (r) can be approximated as: r = d(N)1/2 where d is the average distance between neighboring bases (3.4 Å) and N is the number of segments in the chain:A) Assume that the two ends are contained in the volume of a sphere whose radius is the root mean square distance between the ends. Using this volume (2 ends per unit volume), calculate the molar concentration of these ends (Avogadro's number is 6.02 x 1023). This approximates the effective concentration of the ends.B) What is the effective concentration between the ends if you consider the characteristic ratio of dna?
What mass of sucrose should be combined with 521 of water to make a solution with an osmotic pressure of 8.15 at 285 ? (Assume the density of the solution to be equal to the density of the solvent.)
232.5 ml of 0.0384 M aqueous manganese(III) oxide solution reacts with 1.058 g of solid octahedral sulfur (S8) and the water to give sulfurous acid and a manganese(II) oxide precipitate. You may assume no volume changes in the reaction from soluti..
what is the pressure of 170. ml of oxygen gas at 76.0degc and 170. mm hg if the conditions are adjusted to 450. ml and
Gases azomethane decomposes in a first order reaction when heated: CH3NNCH3 --> N2 + C2H6. The rate constant is 0.0216 min-1. If the initial quantity of azomethane in the flask is 2.00 g, how much remains after 0.0500 hour
the heat of combustion of c10h18 is -6286 kj/mol. the heat of combustion for c10h8 is -5157kj/mol.
How many grams of sodium azide are needed to fill a 30*30*25cm bag to a pressure of 1.30atm at 21.0C?2NaN3=3Na+2N2
The equilibrium constant expression for the reaction 2BrF5(g) Br2(g) + 5F2(g) is A) Kc = [Br2] [F2] / [BrF5] D) Kc = [BrF5]2 / [Br2][F2]5 B) Kc = [Br2] [F2]5 / [BrF5]2 E) Kc = 2[BrF5]2 / ([Br2] × 5[F2]5) C) Kc = [Br2] [F2]2 / [BrF5]5
if .158g of baruim halide is completely precipitated with H2SO4 and .124g of BaSO4 is collected,what is the formula of the barium halide?
Calculate the molality of total ions in an acqeous solution prepared by dissolving 0.400 moles of magnesium chloride in 850.0 g of water?
a star is estimated to have a mass of 2*10´36 kg. Assuming it to be a sphere of average radius 7 * 10´5 km, calculate the average density of the star in units of grams per cubic centimeter.
Compare and contrast the number of representative particles and the mass of UF6 with the number of representative particles and mass of CCl3CF3. Explain any differences you observe.
The frequency of the middle G note on a piano is 392.00 Hz. What is the wavelength of this note in centimeters? The speed of sound in air is 343.06 m/s. Explain steps.
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