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The osmotic pressure of a fraction of poly(vinyl chloride) in a ketone solvent was measured at 25°C. The density of the solvent (which is virtually equal to the density of the solution) was 0.798 g cm-3. Calculate the molar mass and the osmotic virial coefficient, B, of the fraction from the following data:
c/(g /102cm3)
0.200
0.400
0.600
0.088
1.000
h/cm
0.48
1.2
1.86
2.76
3.88
CHM 426/526 - Propose a structure for this compound and Assign the 1H NMR and 13C NMR spectra for your proposed structure.
solution of H3PO4 and you want to completely react it with KOH. How many ml of a .462 M KOH solution do you need to accomplish this? How many grams of the two products do you produce?
Xenon gas is released during a certain chemical reaction and pushes back the atmosphere with a change in volume of the vessel (it has a movable piston) from 2 to 20 Liters. Calculate the work done by this release of gas.
An aqueous antifreeze solution is 55.5% ethylene glycol by mass. the density of the solution is 1.071 g/cm3. calculate the molality. calculate the molarity. calculate the mole fraction.
The rate of a certain chemical reaction is found to increase by the factor 3 from 53.6 °C to 124.5 °C. What is the activation energy (in J) for this reaction?
When a solution is formed by mixing solute B with solvent A, the vapor pressure of A falls to 80% of its value for the pure solvent. What is the composition of the solution
Ozonolysis of a single enantiomer of R produces S, an acyclic, optically active ketoaldehyde of formula C6H10O2. Propose structures for compounds Q, R, and S. Do not label them; simply draw all three of them in the space provided in any order.
question the freezing-point depression of a 0.100 m molality mgso4 solution is 0.225 degrees celsius. determine the
Identify the Qual I cation(s) that is(are) confirmed present in a reference solution by: the formation of a precipitate. the color of a soluble complex ion. the characteristic color of a flame test
A pound of coffee beans yields 53 cups of coffee (4 cups = 1 ). How many milliliters of coffee can be obtained from 1 of coffee beans?
Aromatic Compounds :sample question, Both naphthalene and azulene have 10 pie electrons and are aromatic. Pentalene is apparently antiaromatic and is unstable even at -100 degrees C.
calculate the quantity of heat in calories release when 241.62 g of water is cooled from 80.6degc to
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