Rate of destruction of methane
At an altitude of 35 kilometers, the average concentrations of O* and of CH4 are approximately 100 and 1E11 molecules cm-3 respectively, and the rate constant k for the above reaction is approximately 4.0E-10 cm3 Molecules-1 s-1. Calculate the rate of destruction of methane in molecules per second per cubic centimeter.
How much Fe++ could be present in water containing 2 x 1e-02 M HCO3- (bicarbonate) without causing the precipitation of FeCO3 (Ksp=10**(-10.7))
Amount of calcium carbonate dissolved
The average pH of precipitation in rural areas is 6.80. Assuming that the pH is controlled by the carbonate system, i.e., no anthropogenic acid gases are present in the atmosphere, calculate the amount of calcium carbonate (mg) dissolved per liter of rainwater. pKa1=6.33, KCO2=3.388e-02 I've seen a couple different solutions ...continues
At combustion temperatures, the equilibrium constant for the reaction N2 + O2 -> 2NO is about 4.0E-14. Calculate the concentration(atm) of nitric oxide that is in equilibrium with atmospheric levels of nitrogen and oxygen.
Concentration of Fe2+ in equilibrium with Fe(OH)3
At pH 6.00 and pE 2.10, what is the concentration of Fe2+ (mol/L) in equilibrium with Fe(OH)3? Hint: Use the Nernst equation and the Ksp for the solubility of solid iron (III) hydroxide.
Why is lip gloss long lasting containing petroleum? What does petroleum do to lip gloss?
Assume the average American car is driven 10000 miles/year. How much carbon (in lbs) is released into the atmosphere by this car? Assume gasoline is octane, with a density of 0.692 g/mL. Assume the car mileage is 21 miles/gallon.
How much energy is required for wattage.
If a customer replaces a 85 watt bulb with an 20 watt compact fluorescent bulb that lasts 5000 hours, how much less coal (lbs)will be used to generate the electricity that is saved? Assume the electricity is generated with 30% efficiency and the energy content of the coal is 30 kJ/g.
Figures relating to cigarette smoking and cancer
Consider the following approximate figures relating to cigarette smoking and cancer. The death rate in the US population of 260 million is 12 deaths per 1000 persons per year. One-fifth of these deaths are from cancer and one-fourth of the cancer deaths are from lung cancer. Ninety percent of the lung cancer deaths occur among t ...continues
(a) An acre of corn can produce about 375 gallons of ethanol, using only the kernel of the corn for conversion to ethanol. Assume the energy input to produce an acre of corn is 15000000 kJ. If a gallon of ethanol has an embodied energy in the ethanol of about 80000 kJ, calculate the ratio of embodied energy in the ethanol to th ...continues
