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A reactor contains a material that decays at a 0th order date of 0.20mg/L/day at 20 C. If the initial concentration of the material is 100mg/L, how long will it take for the concentration to be reduced to a) 50mg/L, b) 10mg/L, c) 1mg/L?
A solution contains a mixture of Cl- and Br- ions. Can both be positively identified? Briefly explain. Write appropriate equations to support your answer.
Why does kininogen bind to glycosaminoglycans easily and why is the binding of kininogen less sensitive to physiological pH changes - How is the binding of HPRG to heparin dependent on pH? Give structural reasons for the binding dependence.
What are all the 8 possible products from the aldol reaction between butanal and 3-phenylpropanal
a 25.0-ml sample of 1.00 m nh3 is titrated with 0.15 m hcl. what is the ph of the solution after 15.00 ml of acid have
A and B are stereoisomers. They are nonsuperimposable and are mirror images of one another. Which of the following best describes the relationship between A and B
For a particular reaction (2R(g) ? P(s)) it was found that at one constant temperature, the pressure of R dropped 1.00 atm to 0.500 atm in 32.0 minutes.
Calcium fluoride Ca F 2 is an insoluble salt. The Ksp is 3.4 x 10 -11. Calculate the molar solubility of calcium fluoride. If the concentration of fluoride in fluoridated drinking water is 1 x 10 -5 M and the calcium ion concentration in blood is 2..
Calculate the molarity of a solution made by dissolving 0.850 grams of Na2SO4 in enough water to form exactly 930 mL of solution.
The heat of fusion of water is 6.01 kJ/mol and the molar heat capacity is 36.6 J/(oK.mol) for ice and 75.3 J/(oK.mol) for liquid water.
When 350.0 mL of 0.45 M benzoic acid is titrated with 0.15 M NaOH, what is the pH of the solution after 200.0 mL of base has been added? The pKa for benzoic acid is 4.19
Carbonyl fluoride, , is an important intermediate used in the production of fluorine-containing compounds. For instance, it is used to make the refrigerant carbon tetrafluoride
Arrange the following solutions in order of decreasing freezing point: 0.20 m Fe(OH)2, 0.15 m C6H6, 0.10 m K3PO4, 0.15 m CH3COOH, 0.35 m KBr.
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