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For Hickman still or for test tube microscale distillations, compare the refractive index data for simple and fractional distillations. Do the data suggest which distillation procedure is more efficient? Briefly explain.
2nahco3 -gt na2co3 h2o co2what is the theoretical atom economy of this reaction? sodiumcarbonate is the desired
the density of liquid water at 0 degrees c is 0.9987 gcm cubed the density of ice at this same temperature is 0.917 gcm
Define one of the advantages and disadvantages of any method of sample preparation for an IR experiment
A spherical fat cell has a diameter of 2.47 micrometers. The fat cell contains three copies of the protein azurin. What is the molar concentration of azurin within the fat cell?
How many mL of 2.50 M H3PO4 are required to completely react with 5.35g of a solid containing 34.3 wt% Al(NO3)3 (assuming the product of interest is aluminium phosphate)
If a laser operated on the n=5 to n=2 transition of a H atom, what wavelength in nm photon would be emitted? (E2= -82 kJ/mol, E1= -328 kJ/mol)
Nitrogen and Oxygen gases may react to form nitrogen monoxide. At 1500 C, Kc=1.0*10-5. If .030 mol N2 amd O2 are sealed in a 1.0 L flask at 1500 C. what is the concentration of NO when equlibrium is established
Calculate the boiling point (in degrees C) of a solution made by dissolving 3.20 g of naphthalene {C10H8} in 81.1 g of cyclohexane. The Kbp of the solvent is 2.79 K/m and the normal boiling point is 80.7 degrees C.
It takes 3.1 minutes for a 1.000-g sample of a certain isotope to decay to 0.350 g. What is the half-life of this isotope
The two rings are heated to 66.1 C and dropped into a 15.0 mL of water at 20.5 C. When equilibrium is reached, the temperature of the water is 22.5 C. What is the mass of gold ring. (Assume a density of 0.998 g/mL for water.)
Calculate the pH of a solution made by adding 11.0 g of sodium formate, NaHCOO, to 400. mL of 0.65 M formic acid, HCOOH. Hint what kind of solution is made
Acetic Acid has a pKa of 4.76. Starting with a 1.0M solution of sodium acetate, and a 1.0M solution of acetic acid, what volume of each is required to make 1.0 liter of a 1.0 M solution buffered at pH 5.1
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