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Menthol is a crystalline substance with a peppermint taste and odor. While 1.65 g of menthol is dissolved in 25.0 g of cyclohexane the freezing point of the solution is lowered by 8.78 °C. The freezing point as well as Kf constant for cyclohexane can be found here. Compute the molar mass of menthol.
What is the composition of the buffer to begin with, both in terms of the concentration and the molar quantity of the two major phosphate species
It is stated that more than one unit cell can be chosen for a structure. If they represent the same structure, however, the unit cells must have the same types of atoms
For a chemical reaction to be non-spontaneous at any temperature, which of the following conditions must be met
Oxygen at 25 degrees C and a pressure of 1000 torr. At STP 1 mol of gas occupies 22.4 L What is the volume in liters of the oxygen gas in the cylinder?
a 2.84g sample of an aqueous ionic salt with a molar mass of 99.37gmol is added to a calorimeter ccal 72.1jdegc
The equilibrium constant Kc for the following reaction PCl3(g) + Cl2(g) PCl5(g) equals 49 at 230°C.If 0.70 mol of PCl3 is added to 0.70 mol of Cl2 in a 1.00-L reaction vessel at 230 degrees Celcius, what is the concentration of PCl3 when equilib..
determine the molar ratio of sodium borohydride to 9-fluorenone that you used in the experiment. why is it necessary to
In terms of ionic equilibria and solubility product theory, explain dissolution of silver chloride in aqueous ammonia and reprecipitation with nitric acid
If I have 2 mM of pyrene in decane, how do I make 10 uM, 0.5 mM, 1.0 mM, and 1.5 mM solutions using the density of decane (0.73 g/mL)
A solid substance X has a vapor pressure of 300mm Hg at 25oC and does not conduct electricity. Solid substance Y has an undetectably small vapor pressure at 25oC and is a good electrical conductor.
A coffee can (with diameter of 6.0 inches, a height of 6.5 inches and a massof 256 g) has a 1 cm diameter hole drilled in the bottom of the can and another drilled in the side. The can is capped, inverted, and completely filled with methane
what are the various parameters that can be changed performing MASCOT. how could them affects probability score, any one know about this
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