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Define why a significant excess of sodium borohydride, NaBH4, is used to reduce aldehyde compounds containing additional acidic functional groups (eg phenols, carboxylic acids). Give a balanced chemical reaction for one mole of a carboxylic acid (R-COOH) reacting with one mole of NaBH4.
Calculate the entropy change. What would be the value of S if the heating were carried out irreversibly?
Complete combustion of 7.60 g of a hydrocarbon produced 24.3 g of CO2 and 8.70 g of H2O. What is the empirical formula for the hydrocarbon?
If a mixture of gases contained 78% nitrogen at a pressure of 984 torr and 22% carbon dioxide at 345 torr, what is the total pressure of the system?
what is the PH of cocaine hydrochloride that results from neutralizing a 25mL aliquot of 0.0372M cocaine solution
Calculate the sedimentation coefficient, the molar mass and the frictional coefficient of the RSA
How many grams of Br2 would there be in 8.00 moles of Br2?
When hydrogenating methyl trans-cinnamate or dimethyl fumurate using 5% Pd/C at room temperature, how will you determine if the reaction is chemoselective
A titration is performed to determine the amount of sulfuric acid, H2SO4, in a 12.00 mL sample taken from car battery. About 50 mL of water is added to the sample, and then it is titrated with 48.62 mL of a standard 0.6403 M NaOH solution
Draw the product of the reaction of cyclopentanone with chromic acid. If no reaction occurs, draw cyclopentanone. Hydride reduction (with LiAlH4 or NaBH4) of (S)-3-phenyl-2-butanone has been reported in the chemical literature and gives a mixture o..
A solution of salicylate dianion is prepared by mixing 0.158 g of reagent grade acetylsalicylic acid in 5 mL of 1 M sodium hydroxide and heating the mixture until all of the solid dissolves.
If all the energy obtained by by burning 1.26 lb of butane (fuel value is 10.85 kcal/g) is used to heat 126.0 kg of water at an initial temp of 19.7C, what is the final temperature.
What mass of water is necessary to prepare each of the following solutions? 1.) 200.0g of 1.30\% saline solution 2.) 80.00g of 15.0\% sugar solution
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