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You are a member of EPA enforcement team investigating the possible ongoing dumping of arsenic in Cavalier Lake. You take water samples from the middle of the lake and find that the concentration is 89.6 ppb. 10 days later you take another sample and find it is 81.9 ppb. Convinced now of the problem, you make discrete inquires at a company situated on the lake and employee confesses to you that they have been dumping 89 g/min for years but that the dumping has now stopped. If lake has a residence time of 100 days, the flowrate into the lake is 10 m3/s, the surface area of the lake is 107m2, and the rate of evaporation out from the lake is 6 cm/wk, how long ago from the second sampling time did the dumping stop?
Octane has a density of 0.692 g/mL at 20 C. How many grams of O_2 are required to burn 1.50 gal of C_8H_18?
Metals such as magnesium and zinc react with dilute sulfuric acid to give hydrogen, according to the equation: M (s) + H2SO4 (aq) -------> MSO4 (aq) + H2 (g) When 5.00 g of a mixture of powdered magnesium and zinc were dissolved in diluted sulfuri..
What us the partial pressure (in atm) of carbon dioxide and the partial pressure (in atm) of water vapor? (For the purpose of this question, assume ideal gas behavior.)
Calculate the empirical and molecular formulae of A and B. Deduce the structural formulae of A and B. State the type isoerism exhibited by A and B.
Using the van der Waals equation, calculate the pressure of 14.0 g of N2 in a 0.600 L container at 27.0 °C. The van der Waals constants
A 0.2527-g sample of a mixture of Mg(OH)2 and Al(OH)3 was treated with 50.00 mL of 0.225 mol L?1 HCl(aq). The resulting solution required 13.73 mL of 0.176 mol L?1 NaOH(aq) to neutralize the excess, unreacted HCl. What was the percentage by mass o..
The solubility product constant for Cu(IO3)2 is 1.44 x 10-7. What volume of 0.0520 M S2O32- would be required to titrate a 20.00 mL sample of a saturated solution of Cu(IO3)2?
A piece of metal of mass 22 g at 92C is placed in a calorimeter containing 53.7 g of water at 21C. The final temperature of the mixture is 55.3C. What is the specific heat capacity of the metal?
A student determines that a 5.869g sample of solid displaces 1.75 mL of water in a graduated cylinder. Another student measures a 7.254g sample of the same metal. What volume of water should the second sample displace
During the purification and recrystallization of a solid why can't you just remove the solvent by evaporation after filtering and decolorizing
At a certain temperature the vapor pressure of pure benzene and pure toluene are 380 torr and 130 torr, respectively.
A 195mg sample of a non-electrolyte isolated from throat lozenges was dissolved in enough water to make 10.0mL of solution at 25 degrees Celsius. The osmotic pressure of the resulting solution was 4.83atm. Calculate the molar mass of the compound.
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