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Methane is an important trace constituent of our lower atmosphere (the troposphere). It is a significant greenhouse gas absorbing infrared radiation from the Earth's surface potentially leading to global warming. The main mechanism for methane removal is reaction with the hydroxyl radical, CH4 + OH → CH3 + H2O The temperature of the troposphere declines with altitude. Calculate the relative change in the rate coefficient for the reaction at the Earth's surface (T = 295 K) and at the top of the troposphere (T = 220 K). The reaction has an activation energy of 19.5 kJ/mol.
What is the change in the boiling point of water at 100C per mm change in atmospheric pressure? The densities of water and steam at 100C are .958 and 5.977 X 10^-4 g/cm^3
ammonium nitrate decomposes explosively upon heating to form nirtogen gas oxygen gas and sterm. assume ideal behavior
Mercury poisoning is a debilitating disease that is often fatal. In the human body, mercury reacts u'ith essential enzymes-leading to irreversible inactivity of these enzymes.
Which resonance structure for the SCN- ion and the COS molecule would you expect to be more stable
If an electrode has a potential of -1.004 V with respect to a saturated calomel electrode, what is the potential with respect to a silver-silver chloride electrode
The mass of an average blueberry is 0.72 g and the mass of an automobile is 1900 kg. Find the number of automobiles whose total mass is the same as 1.0 {rm mol} blueberries.
Explain why the extrapolated temperature is used to determine the maximum temperature of the mixture rather than the highest record temperature in the experiment.
Write a reaction mechanism for the reaction of (Z) 3-methyl-3-hexene with Cl2 and H2O. Use curved arrows to show electron movements and clearly show the structures of the reaction intermediates and the final product.
A chemist dissolves 0.9 g of an unknown monoprotic (one acidic H) acid in water. She finds that 14.6 mL of 0.426 M NaOH are required to neutralize the acid.
Compute the energy of a photon in the Balmer series that results from the transition n = 5 to n = 2. Explain what is the region of the electromagnetic spectrum. The Rydberg constant equals 2.180 x 10-18 J.
Predict what a plot of temperature versus the volume of distillate will look like for the simple distillation and the fractional distillation of (a) a cyclohexane-toluene mixture and (b) an ethanol-water mixture.
Liquid butane C4H10 , the fuel used in many disposable lighters, has delta Hfinal=-147.5 kj and a density of 0.579 g/ml . Use Hess's law to calculate the enthalpy of combustion in kJ/mol.
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