Chemistry, 29.04.2021 01:00, summerjoiner
As an employee of the los angeles air quality commission, you have been asked to develop a model for computing the distribution of no2 in the atmosphere. the molar flux of no2, at ground level, n"a,0 is presumed known. this flux is attributed to automobile and smoke stack emissions. it is also know that the concentration of no2, at a distance well above ground level is zero and that no2, reacts chemically in the atmosphere. in particular, no2, reacts with unburned hydrocarbons (in a process that is activated by sunlight) to produce pan (peroxyacetylnitrate), the final product of photochemical smog. the reaction is first order, and the local rate at which it occurs may be expressed as ra [mol/m3/s] = -k1*ca.
Answers: 3
Chemistry, 21.06.2019 13:10, puchie1225
Cobalt-60 is an artificial radioisotope that is produced in a nuclear reactor and is used as a gamma-ray source in the treatment of certain types of cancer. if the wavelength of the gamma radiation from a cobalt-60 source is 1.00 Γ 10-3 nm, calculate the energy of a photon of this radiation.
Answers: 2
Chemistry, 22.06.2019 00:30, natalie1755
Butadiene undergoes a reaction at a certain temperature in the gas phase as follows: 2c4h6(g) --> c8h12(g) the following data were collected for this reaction: time (min) [c4h6] (m) 0 0.36 15 0.30 30 0.25 48 0.19 75 0. determine the order of the reaction and the rate constant. 1st order and k = 4.3x10 -4 s-1 1st order and k = 2.3x10-4 s-1 2nd order and k = 4.3x10-4 s-1 2nd order and k = 2.3x10-4 s-1 zero and k = 4.3x10-4 s-1
Answers: 3
Chemistry, 22.06.2019 10:30, shaylawaldo11
Apiece of metal with a length of 1.42 cm was measured using four different instruments. which of the following measurements is the most accurate?
Answers: 3
Chemistry, 22.06.2019 12:00, 1963038660
What are the first two quantum numbers for the electrons located in subshell 4d? what are the first three quantum numbers for the electrons located in subshell 2s? how many electrons can be held in a sublevel l = 3? how many electrons can be held in the energy level n = 4? how many electrons in an atom can share the quantum numbers n = 4 and l = 3?
Answers: 1
As an employee of the los angeles air quality commission, you have been asked to develop a model for...
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