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A truck driver used sand to soak up a 1 g spill of lindane(C6H6Cl6). He placed the contaminate soil in an open drum which then filled up with 150 L ofrainwater during a rainstorm. You test the water to find a concentration of 17 M/L. The partition coefficient for this chemical to the soil is 0.8 L/kg. How much sand did he place in the drum?
Carbon-14 has a half-life of 5730 years. How long will it take for a sample to decay to only 17% of its original amount
Is PH3 polar or nonpolar, and why? Some sources say it's polar because of the lone pair. Others say it's nonpolar
What do the elements in each group have in common. A block is formed by the 28 elements set off at the bottom of the periodic table. What do these elements have in common
In what ways are the mechanistic features of trypsin, chymotrypsin, elastase similar. If the mechanisms of these enzymes are similar, what features of the enzyme active site dictate substrate specificity
calculate number of moles of anhydrous compound recovered. c- calculate number of moles of water lost from the hydrated compound.d- what is the formula of the hydrate?
an average cup of coffee contains about 125 mg of caffeine cahronqoz. if a student drinks 5 cups of coffee before their
Two hydrocarbons A and B each contain six carbon atoms and one C=C. Compound a can exist as both E and Z isomers but compound B cannot . however, both A and B on catalytic hydrogenation give only 3-methylpentane. draw structures and give suitable ..
Iodine-131 is administered orally in the form of NaI(aq) as a treatment for thyroid cancer. The half-life of iodine-131 is 8.04 days. If you begin with 49.8 mg of this isotope, what mass remains after 13.4 days have passed
a 26.0 ml sample of a liquid was found to have a mass of 13.0g. what is the density of the liquid?
Calibration standards. Transfer 1.00, 5.00, 10.00, 15.00 and 20.00 mL aliquots of 10ppm F- solution to 100 mL flasks. Add 50 mL of TISAB containing CDTA to each
A solution of calcium ions contains 5 meq/650. cm3 of calcium ion. How many moles of calcium ion does this solution contain?
An atmoshperic sample contains nitrogen at 599 torr, oxygen at 154 torr, argon at 6 torr, and carbon dioxide. Assuming standard pressure, what is the partial pressure of carbon dioxide gas
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