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A ground water contains dissolved CCl4 , a chlorinated solvent often used in degreasing. The water also contains some dissolved Fe2+. The half reactions for CCl4 and Fe are: CCl4(aq) + 1/2H+ + e- = 1/2CHCl3 + 1/2Cl- E0 = 0.67 Volts Fe3+ + e- = Fe2+ E0 = 0.771 Volts Could a microorganism gain any energy from an overall reaction in which it reduced CCl4 with dissolved Fe2+ as a reductant? Use the E0 data to support your argument.
In the preparation of the esters given in this reaction, the reaction product is extracted with 5% sodium bicarbonate solution (NaHCO3)in the isolation step. Why? What gas is evolved during this washing step? Write a balanced equation for the reac..
What is the subshell corresponding to the following sets of quantum numbers. An example of a subshell is 2s. A) n=3,l=2 b) n=3, l=1
Find the equilibrium partial vapor pressures at 20°C solution of 100 g of benzene plus 100 g of toluene. Find the mole fractions in the vapor phase that is in equalibrium with the above solution.
From your calculation of the specific rotation for L-erythrose 4-phosphate in Q4. above determine the specific optical rotation, [?]D for D-erythrose 4-phosphate? A) -100 B) -10 C) 100 D) 10 E) -1
An organic sample (3 grams mass) is taken from an archeological site. The sample has a beta emission rate of 4.3 counts per minute. These decays originate predominantly from carbon-14 with a half-life of 8270 years. If the abundance of carbon-14 i..
In the Haber process, ammonia is synthesized from N2 and H2: N2 (g) + 3 H2 (g) ? 2 NH3 (g) DGº at 298 K for this reaction is -33.3 kJ/mol. The value of DG at 298 K for a reaction mixture that consists of 1.9 atm N2, 1.6 atm H2 and 0.65 atm NH3 is ..
More gas is then added to the container until it reaches a final volume of 13.9 L. Assuming the pressure and temperature of the gas remain constant, calculate the number of moles of gas added to the container.
Determine how many atoms there are in 1 gallon using your knowledge of mole calculations and unit conversions. Assume that the molecular formula for gasoline = C6H14 ,the density of gasoline =0.85 grams/mL
how many liters of O2 can be made from 342 g H2O2 if the density of O2 is 1.428 g/L?
Draw the Lewis Structure for a Nitrate Ion (NO3-1). Assign the formal charge for the central atom, Nitrogen. What is that formal charge
NH3 is a weak base (Kb = 1.8 × 10-5) and so the salt NH4Cl acts as a weak acid. What is the pH of a solution that is 0.088 M in NH4Cl
Calculate the number of milliliters of stomach acid neutralized by 1 tablespoon of milk of magnesia (1 tablespoon = 3 teaspoons).
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