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A 0.265 mg sample of an enzyme dissolved in 1.00 ml of an aqueous solution at 37°C has an osmotic pressure of 2.26 × 10-3 atm. What is the molar mass of the enzyme?
The solubility of CO2 in water at 25 degrees celsius and 1 atm is 0.034 mol/L. What is its solubility at a partial pressure in air of 0.00017 atm? Assume that CO2 obeys Henry's Law. Enter your answer in scientific notation.
The water solubilities of oxalic acid and sodium oxalate at room temp are 10g/100ml and 3.7g/100ml respectively. Could you prepare oxalic acid by adding HCl to a solution of sodium oxalate, cooling it to room temp, and filtering the resulting mixt..
Calculate the concentration of all ions present in each of the following solutions of strong electrolytes.(a) 0.0214 mol of sodium phosphate in 10.5 mL of solutionchemical concentration Mcation concentration Manion concentration
Potassium metal as well as water reacts to form potassium hydroxide and hydrogen gas. If you react 1.12g of potassium metal as well as 15.0mL of water density = 0.99997 g/mL1) which reactant is the limiting reactant?
Using standard molar entropy values, calculate delta standard molar entropy values for the following reactions. In each case account for the sign of delta standard molar entropy.
What is the sequence of the peptide? Use the one-letter abbreviations for the amino acids, and do not use dashes.
Question- Identify the following statements as true or false. (Use the drop-down menu and select "True" or "False" for each. You must get all 6 correct.) If a process increases the randomness of the particles of a system, the entropy of the system ..
Which of the following will change the equilibrium constant? a. changing temperature, b. nothing changes the value of keq, c.varying the ititial concentration of reactants, d. varying the initial concentration of products, e. changing the volume o..
the anesthetic procaine hydrochloride is often used to deaden pain during dental surgery. the compound is packaged as a 10.% solution (by mass; d= 1.0 g/mL) in water. IF your dentist injects 0.50 mL of the solution, what mass of procaine hydrochlo..
The freezing point depression of water is a rather small 1.86 deg C kg/mol. Addition of 0.454g of zinc chloride to 3.33g of water lowers the melting point by 5.2 deg C. Calculate the expected melting point for this mixture and account for any diff..
identify organic compounds in medications. determine the structure of one active component and identify three functional groups on each molecule.
A sample of oxygen gas occupies a volume of 555.0 mL at 822 torr and -45?. Calculate the temperature in ? if the gas has a volume of 2.53 L at 491mmHg.
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