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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 (CF2Cl2). These air conditioners 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 Cl in kilograms is added to the atmosphere each year due to auto air conditioners?
Chloroform has a molar mass of 119.4 g/mol and a density of 1.499 g/cm^3. Estimate the volume of the above mixture using this information.
HbS has normal shape under normal conditions, but under conditions of low [O2] the hemoglobin forms fibrous aggregations, giving the entire red blood cell a sickle shape. (See image of eight HbS molecules at right.)
galvanic sell is formed from a copper electrode and magnesium electrode in solutions containing their salts in 1.0M concentrations Mg(s)/Mg2+(aq)//Ag1+(aq)/Ag(s)
How would you prepare 250mL of a buffer having a pH of 3.60 using 0.500M NaOH and 0.500M of HNO2. Would you calculate the molarities of the conjugate acid and base pair and then somehow get the volumes from that
Write the equilibrium expression for this weak acid dissociating in water? b. What is the pH of the solution after it had reached equilibrium
product and propose a mechanism when 1-pentene reacts with bromine and water followed by the addition of sodium hydride.
What is the percentage of copper (by mass) in copper(II) nitrate trihydrate. Cu(NO3)2 : 3H20
After the reaction was complete, the solid residue, consisting of KNO2 and the original impurities, had a mass of 24.1 g. Assuming that only the potassium nitrate had decomposed, how many grams of KNO3 were present in the original sample? Answer i..
In conducting a titration of 75.00mL of a certain triprotic acid with 0.0800 M NaOH the following information was recorded. a. the first equivalence point was observed at pH 3.96 after the addition of 12.4 mL of NaOH
Draw all the possible Newman projections of bromoethane. The rotational energy barrier about the C-C bond is 3.7kcal/mole. What is the energy cost of eclipsing a C-H and C-Br bond?
The rate law for the rearrangement of methylisocyanide (CH3NC) to acetontrile (CH3CN) at 800 K is:
If 16.0 mL of .150 M HCL is needed to neutralize all the NH3 from a 2.25-g sample of organic material, calculate the mass percentage of nitrogen in the sample.
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