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A) A catalyst may be defined as a substance that enhances the rate of a chemical reaction without being consumed in the process. By this definition, a catalyst would have an infinite lifetime. The ozone decomposition catalysts however, have finite lifetimes. What are possible sinks for removal of the stratospheric catalysts NO.(free radical) and .Cl (free radical)? Use chemical reactions as appropriate.
B) The following proposal to repair the ozone layer has been made. The suggestion is to inject 'negative charges' into the lower stratosphere, and these would react with CFC's to produce harmless products. From your knowledge of basic chemistry, indicate if this process would be theoretically possible, and discuss the practical requirements of it. Use chemical reactions appropriate.
What mass of oxygen will react with 2.64g of magnesium? 2Mg(s)+O2(g)-->MgO(s)
using the standard enthalpies of formation, what is the standard enthalpy of reaction? CO(g) +H2O(g) =CO2 (g) + H2 (g)
To 1.00 L of a 0.100 M aquoeus solution of the weak base pyridine C5H5N is added 1.00 ml of 14.0 M NaOH. What fraction of the pyridine molecules in the resulting solution react with water to release hydroxide ions? (Kb C5H5N = 1.7 x 10^-9)
question you need to produce a buffer solution that has a ph of 5.23. you already have a solution that contains 10 mmol
It takes 51.0j to raise the temperature of an 11.4g piece of unknown metal from 13.0c to 25.0c. What is the specific heat for the metal
The temperature of a 22.0 g sample of material increases from 190.0 degree C to 42.0 degree C when it absorbs 5.00 kJ of energy as heat. What is the specific heat of this material?
Antimycin A blocks electron transport in Complex III of mitochondria. Could the addition of antimycin A to chloroplasts affect chloroplast ATP and/or NADPH synthesis. why or why not.
An element crystallizes in a face-centered cubic lattice. The edge of the unit cell is 392 pm, and the density of the crystal is 21.45 g/cm3. Calculate the atomic weight of the element (in g/mol)
An important step in the synthesis of nitric acid is the conversion of ammonia to nitric oxide. H° f [NH3(g)] = -45.9 kJ/mol; H° f [NO(g)] = 90.3 kJ/mol; H°f[H2O(g)] = -241.8 kJ/mol
You are a hazmat responder and walk into what appears to be a meth lab. There are flasks of iodine, White Gas fuel, Sodium Hydroxide, Nitric Acid, and a box of ephidrine.
Assuming that radiation with ?=15.0 cm is used, that all the energy is converted to heat, and that 4.184 J is needed to raise the temperature of 1.00 g of water by 1.00 ^0C , how many photons are necessary to raise the temperature of a 350 mL cup ..
A solution of 0.1% sodium dodycl sulfate (SDS) binds so strongly to polypetide chains that one detergent molecule is sufficient to saturate two amino acid residues.
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