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Question - 1) An aqueous solution of an organic compound (d = 1.063 g/mL) has an osmotic pressure 12.16 atm at 25.0 degree C a freezing point of -1.03 degree C . What is its molar mass? (R= 0.082 Latm/molxK and Kf =1.86 degree C Kg/mol)
2) The vapor pressure of pure bromine is 44.0 mmHg at 4l.0 degree C. Bromine boils at 58.9 degree C, Calculate its heat of vaporization in kJ. R =8.314J/molxK.
3) What is the pH of 0.5% NaCN? (Ka HCN = 4.0x10^-10). Calculate % hydrolysis.
Illustrate all work utilize additional paper if required.
To aid in the prevention of tooth decay, it is recommend that drinking water contain 0.90 ppm fluoride (F-). (a) How many grams of F- must be added to a cylindrical water reservior having a diameter of 5.20 x 102 m and a depth of 47.11 m
Why Nusselt number can be treat as a ratio of conductive resistance to convective resistance
After heating, the remaining solid weighed 0.427 g. Assuming all the CaCO3 broke down to CaO and CO2, calculate the mass percent of CaCO3 in the original mixture.
Compute the impact velocity necessary to heat and completely melt a lead bullet initially at 60 C when it strikes a massive steel plate. Overlook heat transfer to the plate.
Question- Alcohol dehydrations are catalyzed by concentrated phosphoric and sulfuric acid. Why are these acids preferable to a simpler acid such as HCl? Consider the concentrations of the acids. In addition to the alkene, what else is produced in ..
A first-order reaction has a half-life of 55.0 min at 25 ºC and 6.8 min at 100 ºC. What is the activation energy for this reaction
Consider the general chemical equation. 9 A + 2 B ---> 8 C + 4 D (a) How many moles of C are produced from 9 moles of A. (b) How many liters of gas D are produced from 9 liters of gas A at the same temperature and pressure
An experiment shows that a 248 -mL gas sample has a mass of 0.433 g at a pressure of 749 mmHg and a temperature of 29*C. What is the molar mass of the gas
If the specific heat of the solution is 4.18 J/g(g*degreesC), calculate delta H for the reaction, as written. Ba(s) + 2H2O(l) = Ba(OH)2 (aq) + H2 (g) Delta H=?
Typically, the concentration of hydronium, H+, or hydroxide,OH- , ions in an aqueous solution is less than 1M . It is not uncommon to have hydronium ion concentrations that are much smaller
A clinic took temperature readings of 250 flu patients over a weekend as well as discovered the temperature distribution, to be Gaussian with a mean of 101.00 F as well as a standard deviation of .9530
How does a decrease in temperature affect the partial pressure of the underlined substances and the value for Keq for each of the following reactions
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