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Arginine vasopressin is a pituitary hormone. It assists regulate the amount of water in the blood by reducing the flow of urine from the kidneys. An aqueous solution containing 21.6 mg of vasopressin in100.0mL of solution has an osmotic pressure at 25°C of 3.70mmHg. Explain what is the molecular weight of the hormone?
if a 210 mg piece of gold (density=19.32 b/cm^3) is hammered into a sheep measuring 2.3*10 ft. what is the average thickness of the sheet in meters?
A 1.39 mole quantity of NOCL was initially in a 1.0 L container. At equilibrium it was determined that 20% of the NOCL had dissociated. What is the value of the equilibrium constant under these conditions?
What volume of 0.382 M NaOH is needed to reach the equivalence point in the titration of 24.9 mL of 0.0390 M chlorous acid, and what is the name of the salt that is formed during the titration
Prepare a standard of lidocaine in methanol with a final concentration of 1.00 mg/mL using the powder lidocaine/HCl. Show the calculations and explain how you take the salt form into account.
For equal moles of CaCl2 and Fe(NO3)3 dissolved in the same volume of distilled water, how do you expect the conductivities of each solution to compare? Explain your reasoning.
Calculate the equilibrium pressure of CO2 due to the decomposition of barium carbonate (BaCO3) at 25°C. In atm.
Draw the product for the chlorination of 2-methylbutane that proceeded through a secondary radical
The reaction CH4+2O2==CO2+2H2O is exothermic. Which of the following will drive the reaction to the right? A. a decrease in temperature B. an increase in temperature C. addition of a catalyst D. removal of CH4
Suppose we add 10.5 g or 0.100 mol of sodium acetate, NaC2H3O2 to 1 L of a 0.100 M solution of acetic acid HC2H3O2. What is the pH of the resultant solution?
A voltaic cell consists of an Mn/Mn2+ half-cell and a Pb/Pb2+ half-cell. Calculate [Pb2+] when [Mn2+] is 1.1 M and Ecell = 0.35 V. How about when [Mn2+] is 3.1 M and Ecell = 0.45 V. Calculate the Molarity for both situations.
A large flask with a volume of 936 mL is evacuated and found to have a mass of 134.66g. It is then filled to a pressure of 0.967atm at 31 degrees C with a gas of unknown molar mass and then reweighed to give a new mass of 153.81g. What is the mola..
how much energy is released when 89 grams of water vapor (steam) is cooled from 503 K to 354 K?
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