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The solubility of caffeine in water is 2.2mg/mL at 25 degrees celsius and 670 mg/mL at 100 degrees celsius. How many mL of boiling water would it take to dissolve 23g of caffeine? If the solution was cooled to 25 degrees celsius, how many grams of caffeine would recrystallize out?
Give the structural formula of the lewis-acid base complex which consists of one mole of phenylmagnesium bromide and two moles of diethyl ether.
What is the Ka of HCOOH? What is the base on the left side of the equilibrium? What is the conjugate base on the right side of the equilibrium?
Using the balanced equation of BaCl2 + 2AgNO3 => 2AgCl + Ba(NO3)2, answer the following questions: What mass of AgNO3, in grams, is required for complete reaction with 0.156 g of BaCl2? What mass of AgCl is produced?
What region of the electromagentic spectrum does this belong to, the frequency of this energy and the energy in J/photon and kJ/mole?
Imagine that you have two iron blocks, one with a mass 226 g at a temperature of 46.0 oC, and another with a mass 380 g at a temperature of 134 oC. The two blocks are brought into contact with each other in an insulated container. What is the fina..
Calculate the percent yield of 1.0 grams of salicylic acid obtained from the hydrolysis of 1.3 mL of methyl salicylate.
sodium sulfate how many grams of solid ppt will be formed. How many grams of reactant in excess will remain. What is chemical equation
When the protien is treated with cyanogen bromide, four peptides are obtained. When treated with trypsin, 15 peptides are obtained. What do these results suggest regarding the sequence of the protien? Please be as specific and detailed as possible..
KEtones also undergo the aldo condensation, although a succesful reaction often requires "enhanced" conditions, since the addition involves an unfavorable equilibrium constant.
Given two liters of .407 M KCl how many milliliters of this solution you should use to prepare 250.0 ml of .175M KCl
In a laboratory experiment, students synthesized a new compound and found that when 3.449 grams of the compound were dissolved in 179.2 grams of chloroform, the vapor pressure of the solution was 170.93 mm Hg.
Determine the number of moles of CO2 that could be produced from the combustion of 0.00993 moles of Benzene
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