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1. A pepsin of 3 grams get dissolved in water and formed a solution of 10.00 mL , it was found that the osmotic pressure was 0.213 atm at 25 degree Celsius then calculate what would be the molecular weight of pepsin?
2. as of 2007 world record for swimming 1500.0 m in a long course pool is 14 min 34.56 s. if we follow this rate then calculate how many seconds would be taken by a man to swim 0.850 miles?
A buffer is made by combining 3.50 L of 0.200M butylamine, C4H9NH2 with 7.50L of 0.100M butylammonium chloride, C4H9NH3Cl. Assuming that volumes are additive
Compute the number of gms of CoCl2 that would be needed to prepare the solutions:(a) 550 mL of a 1.75 M solution (b) 210 mL of a 0.0180 M solution.
While cytotoxicity, antiviral activity, and immunosuppressant properties of didemnin-C and of its 8 analogs were excellent to very good, these compounds were, unfortunately, dropped from further studies and development at the stage of human trials..
If iron is oxidized to Fe2+ by a copper(II) sulfate solution, and 0.519 grams of iron and 21.0 mL of 0.590M copper(II) sulfate react to form as much product as possible, how many millimoles (mmol) of the non-limiting reactant will remain unuse..
If it is Ionic, mention which is the cation and which is the anion. Discuss how the ions formed (gaining or losing electrons and how many). If it is covalent, discuss where the covalent bonds are and draw the structure.
The half-life of a reaction, is the time it takes for the reactant concentration to decrease by half. For example, after one half-life the concentration falls from the initial concentration to, after a second half-life to, after a third half-life ..
How many moles of NaOH are needed to raise the pH of a 4.50 L tank containing 0.00100 M HCl solution to 3.50?
In relation to the previous question, diazonium salts couple with phenols in slightly alkaline solution. What effect does the pH of the solution have on the reactivity of the phenol?
The nickel-cadmium battery cell has a standard potential of +1.20 V. The cell reaction is: 2 NiO(OH)(s) + Cd(s) + H2O(l) --> 2Ni(OH)2(s) + Cd(OH)2(s) What is the standard free energy change for this reaction
Include square brackets around the coordination complex. Do not include the oxidation state on the metal. Use parentheses only around polyatomic ligands. For ethylenediamine use (en) in the formula.
A 1.08 g sample of caffeine, C8H10N4O2, burns in a constant-volume calorimeter that has a heat capacity of 7.85 kJ/K. The temperature increases from 298.55 K to 303.37 K. What is the molar heat of combustion of caffeine (in kJ).
Ozone (O3) and )2 have a kc= 6.32 *10^37 in the reaction below, if a container is filled with a concentration of .0500 M O2 (and no ozone), what will be the concentration of ozone when the system comes to equilibrium
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