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Estimate the concentration of KCL solution at 298K, if the vapor pressure of pure water is 23.76 mmHg and that of KCL solution is 22.98 mmHg. (assume that KCl completely dissociates into ions in solution and density of water is 1kg L-1).
How many metric tons (t) of oxygen are combined in a sample of pitchblende that contains 2.5 t of uranium? Analysis shows that 84.2 g of pitchblende contains
For a reaction in which delta H= -360.1 kJ/mol and delta= - 90.0 J/K*mol, determine the temperature (in *C) below which the reaction is spontaneous.
Identify the mass spectral (MS) peaks you would expect for 4-Heptanone (M+ and m/z for all fragments). Just FYI, the professor said
Cadaverine, a fould smelling substance produced by the action of bacteria on meat, contains 58.55% C, 13.81% H and 27.40% N. Its molar mass is 102.2 g/mol.
The initial mass of the crude ether was 141mg. The mass after recrystallization was 121mg. Calculate the percent recovery from recrystallization.
Describe the chemistry involved in the current indstrial preparation of adipic acid, specifically listing the major by-product
If you used the 9000 kilojoules you expend in energy in one day to heat 51000 {rm g} of water at 23^circ {rm C}, what would be the rise in temperature?
Derived from common sense is the same as the one derived mathematically from the equation obtained in the experiment.
Determine which flask has the smallest amount of water vapour and which one has greater vapor pressure of H 2 O?
Dissolving 3.00 g of an impure sample of CaCO3 in an excess of HCl acid produced .656 L of CO2 (measured at 20 degrees C and 792 mmHg). calculate the percent by mass of calcium carbonate in the sample. State any assumptions.
If all connections in the apparatus are not airtight and some hydrogen gas escapes during the reaction
If 110mg of fluorine-18, which has a half-life of 110min, is shipped at 8:00 a.m., how many milligrams of the radioisotope are still active if the sample arrives at the radiology laboratory at 1:30 p.m.?
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