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Iodine-131 is a radioactive isotope. After 4.00 days, 70.8% of a sample of 131I remains. What is the half-life of 131I?
Predict the fraction of octahedral holes and tetrahedral holes that are filled by the various cations. octahedral holes filled with aluminum ions and tetrahedral holes filled with magnesium ions.
Friedel-Crafts alkylation and acylation reactions won't work because of the deactivating nitro group present on the benzene ring. Propose an alternate pathway to the ketone product desired
What is the FORMULA for the limiting reagent? What is the maximum amount of potassium carbonate that can be formed in grams?
how does the attractive force that the nucleus exerts on an electron change with the principal energy level of the electron?
When a rod of metallic lead was added to a 0.0100M solution of Co^+3, it was found that 68% of the cobalt in solution was reduced to Co^+2 by the lead. Find the value of K for Pb + 2Co^+3 = Pb^+2 + 2Co^+2
Dibenzalacetone has two carbon-carbon double bonds. How many geometric isomers are possible? Draw all possible geometric isomers of the product and look up their melting points.
Given the reaction 4Al(s)+302(g)--2Al2O3(S), what is the minimum number of moles of oxygen gas required to produce 1.00 mol of aluminum oxide?
write the ground state electron configuration( using molecular orbital theory) for o2 and show that it is paramagnetic.
A certain reaction has an activation energy of 70.0 kj/mol and a frequency of factor A1=7.80*10^12 M^-1 s^-1. what is the rate constant, k of this reaction at 24.0 degrees celcius.
Calculate the amount of heat liberated (in kJ) from 355 g of mercury when it cools from 76.0°C to 13.0°C.
An equimolar liquid mixture of benzene and toluene at 10C is fed continuously to a vessel in which mixture is heated to 50C.
Draw all the resonance structures for the N2O4 molecule. The skeletal structure of the molecule is
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