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The diameter of the methyl radical is about 308 pm. What is the maximum rate constant in the expression d[C2H6]/dt = k[CH3]2 for secondorder recombination of radicals at room temperature? 10 per cent of a 1.0- dm3 sample of ethane at 298 K and 100 kPa is dissociated into methyl radicals. What is the minimum time for 90 per cent recombination?
An auto bumper is coated with a layer of chromium, 0.017 cm thick. The bumper has a surface area of 3.43 x 104 cm2. The density of chromium metal is 7.19 g/cm3. How many atoms of chromium are used in the coating?
Calculate the pH at the equivalence point for the titration of 0.180 M methylamine (CH3NH2) with 0.180 M HCl. The Kb of methylamine is 5.0 x 10-4 M.
A yellow line in the sodium emission spectrum has a wavelength of 589 nm. Calculate the frequency of that line. How do I solve this
When 1.555g of this compound (molar mass=130.13g/mol) was burned in a bomb calorimeter, the temperature of the calorimeter (including its contents) rose by 7.429 degrees celsius. What is the heat capacity (calorimeter constant) of the calorimeter
you are given a small bar of an unknown metal x. you find the density of the metal to be 10.5 gcm3. an x-ray
Calculate the molarity (M) of Ba2+ in a solution prepared by adding 0.200 L of 0.400 M Ba(ClO4)2 and 100 mL of 0.400 M Ba(ClO4)2 . Assume volumes are additive.
Calculate the volume of a 2.00 M KOH solution needed to neutralize 40.0 mL of a 0.600 M H2SO4 solution.
A sample of gas weighs 3.718g and has a volume of 1.4L at .845 torr and 26.0 C. What is its molar mass?
Find the mass of a reactant using Dalton's law of partial pressures, ideal gas law, and stoichiometry - Determine the amount of zinc metal in grams consumed in the reaction.(Vapor pressure of water at 25 o C-23.8mmHg)
Define exposure assessment, and describe the seven steps involved in an exposure-assessment strategy.
The reaction will be spontaneous at high temperatures because increasing the temperature of a system with a negative change in S eventually results in a positive change in G.
a compound is constituted by mass of 22.6 phosphorus the rest being chlorine. given that a volume of 307 ml of the gas
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