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The sedimentation coefficient of a certain DNA in 1 M NaCl at 20 oC was measured by boundary sedimentation at 24,630 rpm. The following data were recorded time (min) distance (cm) 16 6.2687 32 6.3507 48 6.4380 64 6.5174 80 6.6047 96 6.6814 A. Calculate the sedimentation coefficient, s. s =
Calculate the molarity of 52.56 grams of Al2(SO4)3 in 1.80 L of solution.
calculate the root-mean-square speed of Ne atoms at the temperature at which the average kinetic energy
what can you say about the relative buffering abilities of solutions( ranging pH 5-7) when they are challenged by acid
Add sodium hydroxide to copper(II) nitrate and use a stirring rod to test if the solution is basic. How do you establish whether the solution is basic? (Explain what else is needed, what observations are made, and what should be observed if the so..
draw the mechanism for the reaction between 3-chloroaniline and diethyl ethoxymethylenemalonate.
What is the role of sodium sulfite in the experimental procedure of the creation of Benzoic acid. -I know that it breaks down any remaining bleach that did not react, but can someone please explain how it works
Determine how many grams of the following solutes would be needed to make 550 mL of a 0.700 M solution.
When the reaction consumes 10.0 g of liquid N2O4, it releases 124 kJ of heat. What is the value of ?H (in kJ per mole N2O4) for the chemical equation as written
If you wanted to prepare a 1.45 L buffer with a total phosphate concentration of 0.0500 M, how many grams of NaH2PO4 and Na2HPO4 would you mix together? How many grams of conjugate acid do you need? How many grams of conjugate base do you need?
suppose the experiment was done with 1.0m H3PO4 as the acid. What would be the stoichiometric ratio, mol H3PO4/mol NaOH at the intersection of ascending and descending portions of the graph?
In an earlier problem we described the reaction of ammonia with oxygen to form nitrogen monoxide, NO.
Ammonia reacts with hypobromite, OBr-, according to the equation below. Find the molarity of OBr- is 13.35mL of solution reacts with 4.66mg of NH3 (molar mass = 17.03). 2NH3 + 3OBr- ----> N2 + 3Br- + 3H2O
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