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The concentration of Lead ions (Pb 2+) in a sample of polluted water is determined by adding solid sodium sulfate (Na2SO4) to the sample. The net ionic equation of the reaction is
Pb2+ (aq) + SO4 2-(aq) -> PbSO4(s)
Explain how many moles of Pb2+ did the sample contain if .00375 g of Na2SO4 was needed for the complete precipitation of lead ions as PbSO4
Ozonolysis of a single enantiomer of R produces S, an acyclic, optically active ketoaldehyde of formula C6H10O2. Propose structures for compounds Q, R, and S. Do not label them; simply draw all three of them in the space provided in any order.
thomas used equimolar amounts of diethylamine and alpha chloro-26-dimethylacetanilide in the preparation of lidocaine.
The reaction of nitrogen dioxide with carbon monoxide NO2 + CO NO + CO2 is second order in NO2 and zero order in CO. Complete the rate law for this reaction in the box below
Explain how would expect the nonbonding electron-pair domain in NH3 to be greater or less in size than for the corresponding one in PH3
Using A sample having X amount of oxalic acid. If 0.5187 grams of the sample requires 40.20 mL of 0.1000 M Sodium hydroxide to neutralize the oxalic acid completely.
calculate the energy of an electron in the hydrogen atom when n=2 and when n = 6. Calculate the wavelength of the radiation released when an electron moves from n=6 to n=2. Is this line in the visible region of the electromagnetic spectrum
If the activation energy for a given compound is found to be 42.0 kJ/mol, with a frequency factor of 8.0 × 1010 s-1, what is the rate constant for this reaction at 298 K?
A sample of ammonia gas (NH3) is completley decomposed to nitrogen gas and hyrdogen gas. If the total pressure at the end of the reaction in 866mmHg
An important characteristic in the mechanism of this reaction is the formation of a tetrahedral intermediate which is the result of a. the alcohol attacking the 2-phenylacetic acid with the subsequent loss of a proton.
Examine the following acid (H atoms are omitted from the structure): C-C-C=C-C-C-C=C-C-C-COOH. How many more hydrogen atoms would have to be added in order to fully hydrogenate this acid and remove the carbon-carbon double bonds
excess permanganate remains after the reaction period, a small amount of ethanol
In the titration of 68.0 mL of 1.0 M methylamine, CH3NH2 (Kb = 4.4 10-4), with 0.49 M HCl, calculate the pH under the following conditions.
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