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Specify the organic solvent and aqueous solutions to be used for the separation. Provide the exact acid-base reaction that occurs during each step of the separation.
Consider the titration of 100.0 mL of 0.200 M acetic acid (Ka = 1.8 10-5) by 0.100 M KOH. Calculate the pH of the resulting solution after the following volumes of KOH have been added.
A solution is prepared by dissolving 1.98 g of an unknown nonelectrolyte in 21.00 g of cylcohexane (tf = 6.6 oC and kf = 20.0 oC/m). What is the molar mass of the unknown compound if the solution ha
Write the name and the structural formula of the organic product that would result from the reaction below. Don't forget the Markovnikov's rule.
Write the structural formula and the name of the organic product that would result from the hydrogenation (addition of hydrogen) reaction of propene.
What is the concentration of hydrogen ions in a solution containing 0.321 M HOCN (cyanic acid) and 0.223 M (NaOCN) (sodium cyanate)? The ionization constant of cyanic acid is 3.5 × 10-4.
The following reaction takes place in a sealed 40 L container at a temperature of 120 degrees Celsius. 4NH3(g) + 5O2(g) 4NO(g) + 6H2O(g).
As molecules move up fractional distillation column, they condense and then revaporize. Durring which of these steps is the concentration of the more volatile compund of the mixture increased? Why?
Describe the intermolecular forces that must be overcome to convert H2Se liquid into a gas
A copper cube measuring 1.58cm on edge and an aluminum cube measuring 1.68cm on edge are both heated to 56.4 degrees C and submerged in 100.0mL of water at 21.6 degrees C. What is the final temperat
Write the structural formula of organic product that would result from the reaction:
write the expression needed to convert the volume of the solution given in the problem to the volume needed to calculate
Analysis of a carbohydrate showed that it consisted of 40.0 % C, 6.71 % H and 53.3 % O by mass. Its molecular mass was found to be between 140 and 160 amu. What is the molecular formula of this comp
What is the percent yield of a reaction in which 222 g phosphorus trichloride reacts with excess water to form 141 g HCl and aqueous phosphorus acid (H3PO3)?
For a certain chemical reaction,Delta H= -156KJ . Assuming the reaction is at equilibrium, classify each of the following actions by whether it causes a leftward shift, a rightward shift, or no shif
NO-2 (aq) + H3O+(aq) is 4.3 × 10-4 at 25? C. Will nitrous acid spon- taneously dissociate when [HNO2(aq)] = 0.15 M and [NO-2 (aq)] = [H3O+(aq)] = 1.0 × 10-2 M?
Determine the velocity of a medicine ball (m = 10.0 kg) with a wavelength of 1.33 × 10-35 m.
If the initial volume of the container, before any reaction takes place, is 5.00 L, determine the volume of the container after the SO2 (g) and O2 (g) have reacted to completion.
Hawaiian macadamia nuts provide about 190 Cal of energy usable from the digestion of these nuts per 1.0 oz serving. If the usable energy in an 8.5 oz can were used to light a 100-watt (W) light bulb
What volume of ammonia can be produced from 2.0L of nitrogen gas and 3.0L of hydrogen gas? Assume that all gases are measured at the same temperature and pressure.
Oxygen gas is generated by the thermal decomposition of potassium perchlorate. the oxygen gas is captured by water displacement at a water temperature of 20 degrees C resulting in a water vapor pres
An unknown compound has the empirical formula CH2. A 0.050-mol sample of this compound weighs 4.20 g. What is the molecular formula of this compound?
A flask contains 22.5 g of an unknown liquid, initially at 14.0oC. After 2.34 kJ of heat are added to the liquid, its final temperature is 56.3oC. What is the specific heat of the liquid?
How many moles of sodium hypobromite ({rm NaBrO}) should be added to 1.00 {rm L} of 5.0×10-2 M hypobromous acid ({rm HBrO}) to form a buffer solution of pH = 9.14?
The temperature rose by 0.910K. In a separate experiment in the same calorimeter, the combustion of 0.825g of benzoic acid, for which the internal energy of combustion is -3251kJ mol-1, gave a tempe