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There are about 1.5 x 109 scrap tires in the world at the moment; this represents a major waste disposal problem. a. If all of these tires were burned with complete efficiency, by how much (in tonnes) would Earth''s current atmospheric load of C02 increase? b. Compare this to the current atmospheric C02 load. Assume rubber has a molecular formula
a student carried out a simple distillation of toluene for purification. gas chromatography analysis indicated the
Vanadium metal crystallizes in a body centerd cubic crystal lattice. The length of a unit is 0.305nm. Calculate the density of vanadium in g/cm^3
This solution was examined and the instrument reply for the unknown was 1.69 times the signal due to the standard. In a separate experiment, it was found that for equal concentrations of element X as well as the standard the response for element X..
An attempt at synthesizing a certain optically active compound resulted in a mixture of its enantiomers. The mixture had an observed specific rotation of 11.0°. If it is known that the specific rotation of the R enantiomer is -31.0°, determine the..
a sample of Ringer's solution contains the following concentractions (mEq/L) of cations: Na 147, K 4 and Ca2 4. If CI- is the only anion in the solution
Use arrows to predict what will happen when you react phenyl Grignard (C6H5MgCl) with 3-methyl-2-butanone followed by treatment with HCl and distillation
How much heat is required to warm 227 g of ice from -44.9°C to 0.0°C, melt the ice, warm the water from 0.0°C to 100.0°C, boil the water, and heat the steam to 173.0°C?
"Soft" ionization techniques can introduce multiple charges onto a molecule to produce multiply-charged species. Show a possible spectrum for an 1800 Da peptide protonated by chemical ionizatoin with up to 4 charges. Be sure to label the axes and ..
Uric acid is one metabolic end product as well as is excreted from the body in urine. The acid dissociation constant of uric acid is Ka = 4.0 x 10-6 M. The pH of a urine sample is 6.00. Define what is the ratio of urate ion to uric acid in the uri..
Explain which compound in each pair will diffuse with a higher rate through lipid bilayer? a) Asp or Glu b) Thymidine or TMP c) glucose or glucosamine
A rock that contains 3.0 10-15 mol of 232Th (t1/2 = 1.4 multiplied by 1010 yr) has 7.7 104 fission tracks, each track representing the fission of one atom of 232Th. How old is the rock
potassium metal is very reactive with liquid bromide. the result of the reaction is the formation of a ionic solid.
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