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On size-exclusion chromatogram you have three peaks 2.9, 3.5, and 4.8 min. Column dead volume is 12mL as well as flow rate 4 ml/min. Are your separation conditions fit for size-exclusion requirements? Define why.
describe the major absorption bands in the ir spectrum.1.on the ir spectrum of your product label all the major
For the following reactions, identify the substance that is the oxidizing agent and the substance that is the reducing agent.
Aqueous ammonia is commercially available in a solution that is 28% (w/w) ammonia. What is the mole fraction of ammonia in such a solution
Calculate energy emitted by an electron in the 8th energylevel relaxing to the 2nd enegy le el in a Be ^3+ ion. Calculate enegy emitted by electron in the 8th energy level relaxing to the 2nd level in a Be atom
question the solubility of nitrogen in water exposed to the atmosphere where the partial pressure of nitrogen is 593 mm
a tire holds air assume its all n2 at a pressure of 3 atm and in one week the pressue drops by 1 because of inevitable
According to NMR spectra rules, a carbon that is more substituted is more deshielded. For some reason I cannot understand this, because in my mind I see it has more shielding since there is more electron density around it. Please explain in detail..
How many grams of epinepherine barbitrate (m.w. 333) should be used in preparing 495 mL of an opthalmic solution containing the equivalent of 3 % epinepherine (m.w. 183)
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?
your data of the density of sodium chloride solutions should have produced a straight line when plotted. how could this
Assuming that the loss of ability to recall Chem 401 material is a first-order process with a half-life of 55 days for the traditional (talking head lecture) and a C of 305 days for the active approach,
an aqueous solution of copperii sulfate and an aqueous and an aqueous solution of sodium phosphate are mix together in
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