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Explain the solubility of caffeine in water in 2.2mg/mL at 25C and 670 mg/mL at 100C. Explain how mL of boiling water would it take to dissolve 23g of caffeine? Explain if the solution was cooled to 25C, Explain how many grams of caffeine would recrystallize out?
Explain why butyl alcohol and isopropyl iodide are not formed in the reaction. Write a suitable mechanism for the cleavage of butyl isopropyl ether with HI at 100 degrees C to form exclusively isopropyl alcohol and 1- iodobutane.
If the first order half life is 300. seconds at 35 degrees Celsius and the initial concentration of hydrogen peroxide in a commercial Winn-Dixie product is 0.050M, then after 30 minutes, calculate the concentration of the hydrogen peroxide expecte..
A wastewater treatment plant discharges treated sewage into a river, the effluent contains a daily average of 15mg/L of NH4+. The rate constant of NH4+ bio-consumption is 0.03 1/d
How much heat per mole (if any) was exchanged by it's system and it's surroundings. And in which direction did the heat flow
There are two stable isotopes of gallium. their masses are 68.9257 amu and 70.9249 amu. If the average atomic mass of gallium is 69.73 amu, what is the natural abundance of the lighter isotope
A solution of ammonia and water contains 4.20×10^25 water molecules and 6.90×10^24 ammonia molecules. How many total hydrogen atoms are in this solution?
The weight of an object is the product of its mass,m , and the acceleration of gravity,g (where g= 9.8m/s^2 ). If an object's mass is 10kg, what is its weight
if a power plant burning 10000 metric tons of coal per day with 6 excess air emits stack gas containing 222 ppm by
a sample of nitrogen gas occupies 1.55 L at 27.0 C and 1.00 atm pressure. What will the volume be -100 C and the same pressure?
Based on the 4 attached spectra, propose a structure for the unknown organic compound. Please explain each spectrum (IR, H NMR, C NMR, & Mass Spec)
Calculate the partial pressure of O2 produced from 1.71 liters of .64 M N2O5 solution at 45 degrees C over a period of 24 hours if the gas is collected in an 11.5 L container, assuming that the products dont dissolve in chloroform.
A voltaic cell is constructed by immersing a strip of silver in a 1.0M AgNO3 solution and a strip of cadmiun metal in a 1.0M Cd(NO3)2 solution. The circuit is completed by a wire and a salt bridge in the usual way. What is the cell potential for t..
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