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Because of increasing evidence of damage to the ozone layer, chlorofluorocarbon (CFC) production was banned in 1996. However, there are about 100 million auto air conditioners that still use CFC-12 (CF2CI2). These air conditioners that are recharged from stockpiled supplies of CFC-12. If each of the 100 million automobiles contains 1.1 kg of CFC-12 and leaks 25% of its CFC-12 into the atmosphere per year, how much CI in kilograms is added to the atmosphere each year due to auto air conditioners?
calculate the number of PCl3 molecules formed when 97 P4 molecules and 606 Cl2 molecules react?
A small immersion heater is used to heat 475 mL of water from 75 degrees Fahrenheit to 195 degrees fahrenheit in 5.00 minutes.
in a laboratory, 6.82 g of Sr(NO3)2 is dissolved in enough water to form 0.500 L of solution. A0.100 L sample is withdrawn from this stock solution and titrated with 0.0245 M solution of Na2CrO4. What voume of Na2CrO4 solution is needed to precip..
How much energy (in kilojoules) is needed to heat 3.20 of ice from -14.5 C to 23.5 C? The heat of fusion of water is 6.01, KJ/Mol and the molar heat capacity is 36.6 J/
The single proton that forms the nucleus of the hydrogen atom has a radius of approximately 1.0x10^- 13 cm. The hydrogen atom itself has a radius of approximately 52.9 pm.What fraction of the space within the atom is occupied by the nucleus?
A gas bottle contains .65 mol of gas at 730 Hg pressure. If the final pressure is 1.15 atm, how many moles of gas were added to the bottle?
Hydrogen sulfide decomposes according to the following reaction, for which Kc = 9.30 10-8 at 700°C. 2 H2S(g) 2 H2(g) + S2(g) If 0.33 mol H2S is placed in a 4.7 L container
Calculate how wide is the cloud of organisms at the time peak concentration takes place at the intake pipe.
The peptide Special-K forms an ?-helix that is broken at high temperatures. The fraction of peptide in the ?-helical form (fraction = moles a-helical peptide/total moles of peptide)
the osmotic pressure of the solution is 0.443 atm. What is the percent ionization of this acid? I got 20% but its wrong
student performed two melting-point determination on a crystalline compound. in one determination the capillary tube contained a sample about 1-2 mm in hight and the melting range was found to be 141-142C
Hydrogen gas was cooled from 150C to 50 C. It's new volume is75 mL. What was it's original volume?
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