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The following gas phase reaction is second order. 2C2H4(g)--->C4H8(g) Its half life is 1.51 min when [C2H4] is 0.250 M. a.What is k for the reaction? b.How long will it take to go from 0.187 M to 0.0915 M? c.What is the rate of the reaction when [C2H4] is 0.335M?
If the gas is at 23C and 1.0 atm, what mass of helium is in the blimp? The Goodyear blimps, which frequently fly over sporting events, hold approximately 1.85×105 ft^3 of helium.
How many moles of N2 are produced by the decomposition of 1.80 mol of NaN3?
An archeologist finds a huge monolith in the desert. In order to estimate the weight of this object; he estimates the dimensions of the monolith and removes some chips from the rock with his hammer.
Lidocaine is thought to bind to receptors in its methylated form. identify in writting the atoms or groups in the compound that could be involved in its binding to a receptor via- hydrogen bonding (1 example)
A mixture was prepared with the following initial concentrations: [CO] =0.20M, [H2O] = 0.30 M. No formic acid, HCHO2, was initially present. What was the equilibrium concentration of HCHO2?
Diethyl amine density (1.0475 g/mL) Diethyl amine MW 73 Diethyl ether density (0.714 g/mL) Hint: Consider at which temperature the reaction is run. Which of the boiling points and melting points might come into play?
The half-life of radon-222 is 3.8 days. How much of a 100 g sample is left after 15.2 days?
Calculate the diffusion limiting current for the oxidation of an organic compound at an electrode in stagnant solution. Assume 6 electrons are involved in the reaction (n=6). C(org) = 0.01 M, D(org) = 2x10^-5 cm^2/s.
What is the percent by mass of sulfur trioxide (SO3) if oleum is expressed as 3H2SO4 . 5SO3?
Molar concentration, 2.20g of solid NaOH are added to 250mL of a 0.10M FeCl2 solution. Given that Ksp for Fe(OH)2 is 1.6 x 10 -14, calculate the following
Unknown compound A (C8H12) is reacted with H2 (excess) in the presence of a palladium catalyst forming compound B (C8H16). In addition when compound A is reacted with O3 followed by zinc and acetic acid the following two compounds are formed
What mass of sodium azide is required to provide the nitrogen needed to inflate a 47.0 L bag to a pressure of 1.2 atm at 47 C.
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