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While 100 mL of an aqueous solution containing 1g of caffeine is extracted with 10mL of chloroform at room temp, .5g of caffeine is transferred to the chloroform layer. Compute the distribution coefficient of caffeine between chloroform and water at room temp.
when mixture A at 273 K is heated to 473 K, mixture B results. How many different chemical changes occur? How many different physical changes occur?
Upon resonding to a 2am domestic transportation mishap, your hazmat team determines that a liquefied compressed gas is leaking from a 5lb steel cylinder.
To what volume should you dilute 150 mL of an 8.00 M CuCl_2 solution so that 55.0 mL of the diluted solution contains 5.9 g CuCl_2?
Using the calibration equation and the absorbance you measured for the prepared sample, calculate the ferroin concentration. Show your work and don't forget to include units.
a student placed 12.5 of glucose in a volumetric flask added enough water to dissolve the glucose by swirling then
About 30% of crude oil is processed eventually into automobile gasoline. As petroleum prices rise and resources dwindle, alternatives must be found. However, automobile engines can be tuned so that they will run on simple alcohols. Methanol, and e..
A sample of 10mL of a solution of KBr has a mass pf 12.60g. While the solution is evaporated, the residue weighs 3.80g. With this data determine:
Calculate the pH of the resulting solution after the following volumes of HNO3 have been added. (e) 50.0 mL (f) 100.0 mL Show the work please
What volume of 0.240 M K2S solution is required to completely react with 195 mL of 0.155 M Co(NO3)2.
If a wheelchair-marathon racer moving at 13.3 miles per hour expends energy at a rate of 635 Calories per hour, how much energy in Calories would be required to complete a marathon race (26.2 miles) at this pace
The heat of vaporization of liquid water is 40.67 kJ/mol, and the molar heat capacity is 75.3 J/(K*mol) for the liquid and 33.6 J/(K*mol)for the vapor.
Write the balanced net ionic equation for the reaction that occur in the following case. Fe(NO3)2(aq)+KOH(aq) Express your answer as a balanced net ionic equation. Identify all of the phases in your answer. then seperatly what are the spectator io..
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