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Question- Thyroxine, an important hormone that controls the rate of metabolism in the body, can be isolated from the thyroid gland. If 0.455 g of thyroxine is dissolved in 10.0 g of benzene, the freezing point of the solution could be measured as 5.144degreeC. Pure benzene freezes at 5.444degreeC and has n value for the molal freezing point depression constant of K, of 5.12degreeC/m. What is the approximate molar mass of thyroxine?
Determine the solution for the above problem express your work in detail
Suppose a certain substance has a heat of vaporization of 34.00 kJ/mol. Explain at what Kelvin temperature will the vapor pressure be 3.50 times higher than it was at 323 K
Use the octet rule to predict the formula of the compound that would form between tellurium and iodine, if the molecule contains only one tellurium atom and only single bonds are formed.
if a sample containing 1.00 ml of nitroglycerine density 1.592 gml is detonated how many total moles of gas are
A student found that her mixture was 15% NH4Cl and 75% SiO2 .Assuming her calculation are correct, what did she most likely do incorrect in her experiment?
Using the technique of the previous problem ?E was found to be -2,000.00 kJ/mol at 298 K for an unknown liquid hydrocarbon. In another experiment it was determined that for each mole of hydrocarbon
A 0.2527-g sample of a mixture of Mg(OH)2 and Al(OH)3 was treated with 50.00 mL of 0.225 mol L^-1 HCl(aq). The resulting solution required 13.73 mL of 0.176 mol L^-1 NaOH(aq) to neutralize the excess, unreacted HCl. What was the percentage by mass..
a 4.78g sample of aluminum completely reacts with oxygen to form 6.67g of aluminum oxide. what is the mass percent
Is it possible to have homogeneous binary liquid solution whose viscosity is higher or lower than that of either of the two component liquid? what conclusions would you draw about the nature of intermolecular interactions in such a mixture
The rare earth metal terbium is produced from terbium (III) flouride and calcium metal by a single replacement reaction. Given 27.5 g of terbium (III) flouride and 6.96 g of calcium, what is the theoretical yield (in grams) of terbium
in general decreasing the temperature makes which phase transitions more likely to occur?1. condensation fusion
If the optical rotation of pure (R)-2-butanol is -13.5°, then you would expect the optical rotation of racemic 2-butanol to be a) -13.5° b) +13.5° c) 0° d) can't tell
which three elements in the 4th period have exactly three unpaired electrons in their ground state
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