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How many grams of dry NH4Cl need to be added to 2.30 L of a 0.100 M solution of ammonia,NH3, to prepare a buffer solution that has a pH of 9.00? Kb for ammonia is 1.8x 10^-5.
What is the mole fraction of ethanol, CH3CH2OH, in an aqueous solution that is 20.0% ethanol by mass? 0.150
What is the E°cell for the cell represented by the combination of the following half-reactions
The temperature of the calorimeter increased to 54.080C. Calculate the ?H for the reaction. You may assume the butter is pure glyceril tristearate (C57H110O6).
500cm3 of 0.250M of Na2SO4 is added to an aqueous solution of 15.0g of BaCl2 resulting in a white precipitate of insoluble BaSO4.
A solution is prepared by mixing 500. mL of 0.10 M NaOCl and 500. mL of 0.20 M HOCl. What is the pH of this solution? [Ka(HOCl) = 3.2x10-8]
A particular first-order reaction has a rate constant of 1.35 × 102 s-1 at 25°C. What is the magnitude of k at 75°C if Ea=85.6 kJ/mol
Benzoic acid, 1.25g , is reacted with oxygen in a constant volume calorimeter to form H2O(l) and CO2(g) at 298 K. The mass of the water in the inner bath is 1.40×103g . The temperature of the calorimeter and its contents rises 2.83K as a result of..
Answer the questions below with the data provided: 15 mL of 5% NaOH (w/v) is used to deprotonate the unknown carboxylic acid. The TBME is washed with an additional 10 mL of the NaOH solution and then 20 mL of water which are all combined.
The sample is titrated to the phenolphthalein endpoint with 15.17 mL of a sodium hydroxide solution. What is the molar concentration of the NaOH solution
Using decarboxylation reactions, outline a synthesis of each of the following from appropriate starting materials: (a) 2-Hexanone
The volume of the container is 2 ft 3 .Calculate the volume of gas in the container?
Maleic anhydride reacts with ethylene glycol to produce an alkyd resin
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