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A 5.0 g piece of zinc is placed in a beaker of dilute hydrochloric acid. Compute the work done by the system as a result of the reaction. The atmospheric pressure is 1.1atm as well as the temperature is 23oC. Presume perfect gas behavior and the hydrochloric acid is in excess.
Given a stock solution of a food dye having a concentration of 1.0 x 10-5 and an absorbance of 0.700. If a new solution is made by diluting exactly 10.0 mL of the solution with exactly 20.5 mL of distilled water, what should the absorbance of the ..
Write down the equilibrium expression for the conversion for sulpher dioxide into sulpher trioxide and rearrange this expression to give it in the form of an equation for straight line.
The entropy change of the universe for any spontaneous process is always positive The equilibrium constant is always greater than one for an extensive reaction
separate a mixture of alkanes. which hplc mode will you choose and why? consider normal-phased reverse-phased
For each pair of amino acids listed below, predict which one would be first to elute from a cation-exchange column. Assume the buffer pH begins at 3.25 and is increased in a stepwise fashion to pH 6.
What is the freezing point of a 0.19m solution of glucose, C6H12O6, in water? Kf for water is 1.858 C/m
a solution contains both copper ii and nickel ii. the absorbance of this solution at 394 nm is 0.175 while at 810 nm
We mixed ortho vanillin with carbethoxymethylene triphenyphosphorane. I would like to know how the imide was created in the first step. What protonated the amine before the amine protonates the carbonyl
How many grams of urea (NH2)2CO must be added to 351 grams of water to give a solution with a vapor pressure of 2.73mmHg less than that of pure water 3 degrees celsius The vapor pressure of water at 30 degrees celsius is 31.8 mmHg
Define what is the Hrxn° for the reaction of an aqueous solution of lead(II) chloride with an aqueous sodium sulfate solution to make a precipitate of lead(II) sulfate Hrxn°= in kJ.
If a pure R isomer has a specific rotation of -134.0°, and a sample contains 60.0% of the R isomer and 40.0% of its enantiomer, what is the observed specific rotation of the mixture
Consider the combustion of methanol: 2 CH3OH(g) + 3 O2(g) 2 CO2(g) + 4 H2O(g). If CO2 is produced at the rate of 0.8 mol/s, what is the rate of consumption of O2?
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