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Caffeine (C8H10N4O2) is a stimulant found in coffee and tea. If a solution of caffeine in chloroform (CHCl3) as a solvent has a concentration of 0.0900 m, calculate the the percent caffeine by mass and the mole fraction of caffeine.
The white precipitate obtained when cold HCl was added to an unknown solution was completely insoluble in both hot water and NH4OH
Using Hard-Soft Acid-Base Theory, classify each of the species in the following equilibrium as hard or soft and indicate whether reactants or products will be favored
When HSCN is added, you expect that the equilibrium will shift to the right and the reaction mixture will become darker (more orange).
Calculate the integral of dqrev / T for each of the 4 steps in the Carnot cycle of, and sum them to prove that their sum equals zero. This turns out to also be true for any cyclic process that returns the system
C3H8(g)+5O2(g)->3CO2(g)+4H2O If 465 mL of oxygen at STP is used in the reaction, what volume of CO2 measured at 37 degrees C and 0.973 atm, is produced?
Combine the above two equations with that for the formation of liquid water and use addition and/or subtraction(i.e. Hess's Law) to arrive at the equation for the formation of magnesium oxide.
From the heats of reaction as given 3O2(g) ---> 2O3(g) DH = +284.6 kJ, 2H2(g) + O2(g) ---> 2H2O(g) DH = -483.6 kJ
Maleic anhydride reacts with ethylene glycol to produce an alkyd resin. Draw the structure of the condensation
what is heat of vaporization of a liquid that has a vapor pressure of 606 torr at 84 degrees celsius and a boiling point of 96.3 degrees celsius at 1 atm?
The effect of increasing molecular weight (size) on alcohol solubility in water. B. The effect of more alcohol groups on alcohol solubility in hexanes.
A sample of diatomic gas has a density of 0.002061g/ml at 1.8 atm pressure and 25.0°C. identify the gas
You believe you have cracked a secret code that uses elemental symbols to spell words. The code uses numbers to designate the elemental symbols.
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