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Using the reduction potentials above, what is the voltage for the following electrochemical cell?
How many moles of ozone would there be in the air above Los Angeles County (area about 4000 square miles; consider a height of 10m above the ground) if ozone was at this concentration?
In the first 12.0 of the reaction, 1.8×10-2 of is produced in a reaction vessel with a volume of 0.260 . What is the average rate of the reaction over this time interval?
The final number of moles (n_2) is 2.00 rm mol. Use the simulation to find the volume (V_1) of 1.00 rm mol of helium at 273 rm K and calculate the final volume (V_2).
During ascent the temperature of the gas falls from 22°C to -21°C. Calculate the volume of the balloon at its final altitude.
A molecule has an excited state electronic energy level that emits radiation of 1/λ = 360 cm-1 when it falls to the ground state. The ground state is non-degenerate and the excited state is d
In a certain oil spill, hydrocarbons from the oil disappeared with a first-order rate constant of 2 ^ 10 -6 s -1. How many days did it take for the oil spill to decrease to 10% of its initial value?
The water level in a graduated cylinder initially at 220 rises to 279 after a piece of lead is submerged. What is the mass in grams of the lead?
A 350. mL air sample collected at 35 Celsius has a pressure of 550. torr. What pressure will the air exert if it is allowed to expand to 425 mL at 57 Celsius .
A 4.80 g nugget of pure gold absorbed 284 J of heat. What was the final temperature of the gold if the initial temperature was 28.0°C? The specific heat of gold is 0.129 J/(g·°C).
The gas is then compressed by the piston so that its final volume is half the initial volume. The final pressure of the gas is 2.2 atm. What is the final temperature of the gas in degrees Celsius?
What does the volume correction constant (b) in the van der Waals equation represent? Why is b for helium small (b = 0.0238 L /?mol) compared to b for decane (C10H22, b = 0.3043).
When HBr(g) reacts with Cl2(g) to form HCl(g) and Br2(g), 40.6 kJ of energy are evolved for each mole of HBr(g) that reacts.
Why is dinitration not a significant process under the conditions used? and Why is the reaction flask shaken frequently during the addition of the bromobenzene to the acid mixture?
What is the Eo for the Zebra cell, and are the reactants in this battery at room temperature when it is operating? Explain how you know.
Concrete used in road construction is reinforced using steel bars in a grid, known collectively as "rebar." Which would work better for the purpose, magnesium or zinc?
One isotope has a mass of 96.780 amu. The second isotope has a percent abundance of 41.7%. What is the mass of the second isotope?
The dried sample of PbSO4 has a mass of 5.354 grams. What is the concentration of the unknown sulfuric acid solution?
If 12.0 g of O2 is required to inflate a balloon to a certain size at 27 OC what mass of O2 is required to inflate it to the same size (and pressure) at 5.0 oC.
Calculate the pH of a solution prepared by dissolving 0.150 mol of acetic acid and 3.000 mol of sodium acetate in water sufficient to yield 1.00 L of solution.
Calculate the amount of heat required to completely sublime 87.0g of solid dry ice {rm{(CO}}_2 ) at its sublimation temperature.
A 57 g sample of water with a temperature of 16?C is added to 260 g water at 90?C in an insulated container. What is the final temperature after thermal equilibrium is reached?
If the solution of the salt in the cell described in question 10 is saturated, chlorine is produced at the anode instead of oxygen. Using an applied potential of 5.0V to overcome kinetic effects, an
The homogeneous gas reaction A→3R follows second-order kinetics. For a feed rate of 6& ; m 3 /hr of pure. A at 5 atm and 350ºC ,an experimental reactor consisting of a 2.5 cm ID pipe& ; 2