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15.0 grams of an unknown sugar was dissolved in water and the final volume of the solution was brought up to 1.00 L. The osmotic pressure of this solution was determined to be 2.44 atm at 25°C. Which of the sugars below was most likely the unknown sugar?
A. none of these
B. ribose (C5H10O5)
C. glucose (C6H12O6)
D. sucrose (C12H22O11)
The precipitate of CaC2O4, weighed 1.437 grams determine the molarity of calcium chloride in the solution?
Fluorine gas at 300 K occupies a volume of 500 mL. To what temperature should it be lowered to bring the volume to 300 mL
How many moles of oxygen are needed to react with 5.0 moles of ammonia? In the above reaction, how many moles of water can be produced from 256 grams of oxygen?
Calculate the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition
a 4.50 gram sample of LiCl at 25.0 dissolves in 25.o ml of water also at 25.0 Celsius. the final equilibrium temperature of the resulting solution is 60.8 Celsius. what is the enthalpy of solution, delta Hs of LiCl expressed in kilojoules per mole..
If the half-life of a first-order reaction is 4.609 hours what is the instantaneous rate of the reaction in M/day when the concentration of A equals 0.251 M?
An industrial freezer is maintained at -26 oC with a vapor compression refrigeration unit using R-134a (HFC-134a) as the working fluid. A throttle is used in the refrigeration cycle and the compressor is 80% efficient.
In the process, a photon of wavelength 1.28Ã-10-6 m is emitted. What was the value of the principal quantum number for the higher energy level?
which of the following alcohols undergoes dehydration at the fastest rate on being heated with H2SO4? a) 1-butanol b)2-methyl-1-butanol c)2-methyl-2-butanol d)3-methyl-1-butanol e)3-methyl-2-butanol?
A helium balloon has a volume of 3.50L at 22.0 degrees celsius and 1.14atm . What is its volume if the temperature is increased to 30.0 degrees celsius and the pressure is increased to 1.20atm
Enzyme X is a highly pigmented protein that imparts the characteristic color to certain blue-green algae. It also facilitates a reaction necessary to the survival of this species; we can follow the kinetics of this reaction by measuring the conver..
During the experiment of an acid catalyzed dehydration of a secondary alcohol, an elimination reaction (E1) is experienced, and a gas chromatography is performed.
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