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when using a rotary evaporator, the water bath is typically kept at a temperature below the normal boiling point of the solvent to be evaporated. why will the solvent evaporate at a temperature below the normal boiling point? why?
What is the fraction of NTA present after HT2- has been brought to equilibrium with solid PbCO3 at pH 7.00, in a medium in which [HCO3-] = 1.00E-3 M?
Unknown compound A (C8H12) is reacted with H2 (excess) in the presence of a palladium catalyst forming compound B (C8H16). In addition when compound A is reacted with O3 followed by zinc and acetic acid the following two compounds are formed
A 1.996 gram sample of unknown monoprotic acid is dissolved in some water. This acid solution is then titrated to the end point with 27.38 mL of a solution of 0.4165 M KOH.
What is the structure for hexadecanol? What would explain why it is a solid, rather than a liquid?
How many grams of sodium formate, NaCHO2, must be added to 750.0mL of .250 M of formic acid, HCHO2, to obtain a buffer with pH of 5.5 ?
How many liters of N2 gas result at 25.0oC and 1.10 atm pressure when 125 grams of NaN3 react
Calculate the pH of the solution that results when 100.0 mL of 0.15 M NaOH is added to 50.0 mL of 0.25 M HNO3
Isra fills two identical balloons at identical temperatures. She fills one with O2 gas and the other with O3 gas. Which balloon will deflate faster? Why?
A 50.0g silver object and a 45.0 g gold object are both added to a 55.5 mL of water contained in a graduate cylinder. what is the new water level in the cylinder.
calculate the molarity of an aqueous NaOH solution if 32 mL of it is required to titrate .6789 grams of oxalic acid to a phenolphthalein end point.
Compute the mass of solute and water needed to prepare the following solutions: 1. 150 g of 1.00 m (NH4)2SO4: (a) from pure solid (NH4)2SO4 (b) from solid (NH4)2SO4 with a purity of 87.2 wt-% 2. 1.50 L of a 20 wt-% Pb(NO3)2 solution whose density ..
If 358 mL of H2SO4 is neutralized with 60.0 mL of 1.50 M NaOH, what is the initial concentration of the acid?
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