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Question - A stable and highly soluble pollutant is dumped into a lake at the rate of 0.16 metric tons per day. The lake volume is 4 x 107 m3 and the average water flow-through rate is 8 x 104 m3/day. Ignore evaporation from the lake surface and assume the pollutant is uniformly mixed in the lake. What eventual steady-state concentration (in ppm) will the pollutant reach?
What is the pH at the equivalence point of a weak base-strong acid titration if 20.00 mL of NaOCl requires 28.30 mL of 0.50 M HCl? Ka = 3.0 × 10-8 for HOCl.
a solution is made by dissolving 25g of nacl in enough water to make 1.00 l of solution. assume that the density of the
Write a molecular equation for the precipitation reaction (if any) that occurs when the following solution are mixed. How do you convert these over and please show steps.
A particular first-order reaction has a rate constant of 1.35 × 102 s-1 at 25°C. What is the magnitude of k at 75°C if Ea=85.6 kJ/mol
A 0.250g sample of citric acid dissolved in 25.0 mL of water requires 37.20 mL of 0.105 M NaOH for complete neutralization. What is the molecular formula of citric acid?
HIn H+ + In- The following absorbance data were obtained for a 5.00 x 10-4 M solution of HIn in 0.1 M NaOH and 0.1 HCl. Measurements were made at a wavelength of 485 nm and 625 nm with 1.00 cm cell.
Lysine is an amino acid that is an essential part of nutrition but which is not synthesized by the human body.
Name two organic compounds that cannot be extracted effectively from an aqueous solution by means of immiscible organic solvent
What is the probability of a 14C decay taking place in the lungs during a single breath? The atmosphere is about 0.04% CO2, and in an average breath we inhale about 0.5 l of air and exhale it about 3.5 s later.
Vitamin D3 Vitamins are chemicals required by humans in small amounts and are not made within our bodies. Such chemicals must therefore be acquired from ones diet.
Depict structures of the organic starting material as well as product formed for the reduction of vanillin acetate (4-formyl-2-methoxyphenyl acetate C10H10O4) by sodium borodeuteride (NaBD4) reduction.
8.00×10^-3mol of HBr are dissolved in water to make 14.0L of solution. What is the concentration of hydroxide ions,[OH-] , in this solution and 4.00g of NaOH are dissolved in water to make 2.00L of solution. What is the concentration of hydronium ..
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