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Explain a solution is to be prepared with a sodium ion concentration of 0.529 mol/L. Explain what mass of sodium sulfate (g) is needed to prepare 1.54 liters of such a solution?
Using the same sample of gas ( = 275 , = 43 ), we wish to change the pressure to 2750 with no accompanying change in volume or amount of gas.
After treatment with trypsin, which cleaves at R and K, there were 3 fragments: two dipeptides and MGAV. What is the sequence of the peptide? Use the one-letter abbreviations for the amino acids, and do not use dashes.
For a reaction of the form, A + B + C Products, the following observations are made: doubling the concentration of A increases the rate by a factor of 4, doubling the concentration of B has no effect on the rate, and doubling the concentration of ..
The reaction of 0.25 g magnesium with 100 mL of 1 M hydrochloric acid (density d = 1.02 g/ml) raises the temperature of the solution from 20 °C to 35 °C . The specific heat for HCl is 3.93 J/(g.C).
Air is about 78.0% nitrogen molecules and 21.0% oxygen molecules. Several other gases make up the remaining 1% of air molecules. What is the partial pressure of nitrogen in air at atmospheric pressure (1 atm)
gasohol is a fuel containing ethanol c2h5oh that burns in oxygen o2 to give co2 and water. how many moles of o2 are
Also, give an estimate the pl of this tetrapeptide (you may assume the pKa of any acidic R group is 4, the pKa of any basic R group is 11.5, and the pKa of the alpha-COOH is 2, and the alpha-NH3 is 9.5).
calculate the molarity of a solution made by adding 12.9 of CaCl_2 to a flask and dissolving the solid to total volume of solution equal
draw the structure of p-aminobenzoic, and show all importnant resonance structures for this molecule
the combining of the fragments which remain after the loss of an oxygen from the carboxylic acid and two hydrogens from ammonia or an amine.
If a solution contains 28 g of potassium nitrate per 100 g of water at 25 degrees Celsius, is the solution unsaturated, saturated, or supersaturated
r-134a is throttled from 1200kpa and 40oc to 200kpa. it is known that heat of 5kjkg is lost from r-134a to the
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