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Thyroxine, an important hormone that controls the rate of metabolism in the body, can be isolated from the thyroid gland. When 0.455g of Thyroxine is dissolved in 10.0g of benzene, the freezing point of the solution is depressed by 0.3000C. What is the molar mass of Thyroxine?
The activity coefficients for acetic acid and the acetate ion are 1.000 and 0.775, respectively, in a solution with an ionic strength of 0.10 M.
determine the freezing point of a solution of 60.0g of glucose,C6H12O6,dissolved in 80.0g of water.
What is the vapor pressure of SiCl4 (in mm Hg) at 23.5 C? The vapor pressure of SiCl4 is 100 mm Hg at 5.4 C and Delta H vap
When 25.0 g of Zn reacts, how many L of H2 gas are formed at 25 °C and a pressure of 854 mmHg?
Draw structural formulas for all of the structural isomers of C4H10, C5H12 and C3H7Cl.
If a radiation source has an intensity of 700 rem at 2.00m, what distance is needed to decrease the intensity of exposure to below 25 rem
The efficiency of light source = energy of visible light/ total energy 7. What is the relationship between light intensity and distance from the source?
At constant pressure, it is cooled to 18.00 °C where its final volume is 1.75 L. What was the initial temperature?
Calculate the standard free energy change for the process N2O5(s)-->N2O5(g) at 25 0C if Vapor pressure of N2O5 at 7.5 degrees C is 100mmHg, and the solid sublimes at a pressure of 1.00 atm at 32.4 0C.
What is the concentration of lead ions and sulfide ions in a saturated solution of lead sulfide(PbS) solution at 25 degrees Celsius? (Ksp=3.0x10(to the -10 power)
how many grams of carbon dioxide are produced when 23.5 g of 1-pentanol react with excess oxygen in a combustion reaction?
The normal boiling and freezing points of substance X are 87.3 K and 84.0 K respectively. The triple point is at 82.7 K and 0.68 atmosphere. a. Draw a phase diagram for substance X. Label the regions in which the s,l, and g phases are stable.
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