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Freons are compounds that contain carbon, chlorine, and fluorine in various proportions. They are used as foaming agents, propellants, and refrigeration fluids. Freons are controversial because of the damage they do to the ozone layer in the stratosphere. A 4.33-g sample of a particular freon in a 2.55 L bulb at 25°C has a pressure of 262 torr. What is the molar mass of the compound?
Given a mean free path, comment on the appropriateness of using the ideal gas law to determine the number density of a sample at a critical point.
Gaseous HBr has an absorption band centered at about 2645 cm-1 consisting of a series of lines approximately equally spaced with an interval of 16.9cm-1.
A 1.30 g sample of dry ice is added to a 760 mL flask containing nitrogen gas at a temperature of 25.0 degrees Celcius and a pressure of 735 mmHg. The dry ice is allowed to sublime.
Glucose oxidation has a standard enthalpy of -2803 kJ/mol. What is the total heat produced by human respiration over
1. Average speeds of gas particles (give answers in m/s) a. Calculate the average speed of Hg vapor atoms at 500oC b. Calculate the root-mean-square speed
Using a solution containing 0.302 grams of an antibiotic has an osmotic pressure of 8.34 mmHg At 23.6°C, 0.500 L. calculate its molecular mass.
starting with 1-pentanoic acid and using any other required reagents outline a synthesis for 1-penten-2-ol
She found that 0.3127 g of Na2CO3 was needed to completely react with 25.00 mL of the HCl solution. What is the concentration of the HCl solution in M (mol/L)
Use the standard reduction potentials to find the equilibrium constant for each of the following reactions at 25°C.(a) Br2(l) + 2 I ?(aq) 2 Br?(aq) + I2(s)
The nuclide 18f decays by both electron capture and beta plus decay. Find the difference in the energy released by these two processes. The atomic masses are 18F = 18.000950 and 18O= 17.9991598.
Assuming the kinetics of teh microorganisms enzymatic action is responsible for the rate of decay
How much energy is released during the complete combustion of 433 grams of cyclopropane
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