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How many grams of sodium succinate (MW=140 g/mol) and disodium succinate (MW=162 g/mol) must be added to 1L of water to produce a solution with pH=6.0 and a total solute concentration of 50 mM. The pKa of sodium succinate dissociation is 5.64.
Copper can be drawn into thin wires. How many meters of 34 gaugewire (diameter = 6.304 10-3 in)can be produced from the copper in 8.05 lb of covellite
How many liters of H2 gas, measured at 0.992 atm and 365 K, are required to synthesize 0.35 mol of CH3OH?
Write an equation for the reaction of semicarbazide with acetophenone to form a semicarbonazone. What is the melting point of this derivative?
A water skier is pulled by a net force of 135 N and has an acceleration of 1.8 m/s2. What is the mass of the skier.
A solution contains a mixture of pentane and hexane at room temperature. The solution has a vapor pressure of 268 {rm torr}. Pure pentane and hexane have vapor pressures of 425 {rm torr} and 151 {rm torr}, respectively, at room temperature. What i..
A student loaded a mixture onto a small flash chromatography column in 1 mL of methylene chloride, then proceeded to elute with hexanes/ethyl acetate
Muriatic acid is a HCl solutin available in hardware stores. A 3.00-ml sample of muriatic acid required 15.44 ml of 2.04 M NaOH for complete neutralization
Find the limiting reagent in this solution. b) Calculate the theoretical yield of water. c) Calculate the percent yield of water
What two properties of ATP make it ideally useful for a form of energy storage in cells? Describe why the hydrolysis of ATP is highly exergonic (give at least two reasons).
Calculate the pH of a buffer that contains 0.060M ammonium chloride
A 4.80 g nugget of pure gold absorbed 298 J of heat. What was the final temperature of the gold if the initial temperature was 24.0°C? The specific heat of gold is 0.129 J/(g·°C).
Determine the empirical formula of a compound containing 77.3% silver, 7.4% phosphorus and 15.3% oxygen.
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