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Tropylium bromide (7-bromo-1,3,5-cycloheptatriene) is insoluble in nonpolar solvents but dissolves readily in water. When an aqueous solution of tropylium bromide is treated with silver nitrate, a precipitate of AgBr forms immediately. The melting point of tropylium bromide is above 200 degree C, quite high for an organic compound. How can you account for these experimental observations?
25.0 ml of a 0.2450 M NH4Cl solution is added to 55.5ml of 0.1655 M FeCl3. What is H concentration of chloride ion in the final solution.
Calculate the wavelength of the photon emitted when an electron makes a transition
Calculate tthe freezing point in centigrade units of a soluiton consisting of 685 grams of ethylene glycol dissolved
calculate w and delta e when one mole of a liquid is vaporized at its boiling point (80 degrees celscius) and 1.00 atm pressure. Delta H vaporization for the liquid is 30.7 kJ/mol at 80 degrees celscius.
Determine the heats of formation or the steric energies of the exo- and endo-anhydride adducts using a molecular mechanics program.
In one city, a balloon with a volume of 6.0 L is filled with air at 101 kPa pressure. The balloon in then taken to a second city at a much higher altitude
Styrene, phenylethene, is treated with H3PO4, an acid whose conjugate base is a poor nucleophile.
a 155 gram sample of copper was heated to 150 degrees Celsius then placed into 250 gram of water at 19.8 degrees Celsius. Calculate the final temperature of the mixture.
How much energy in joules is required to heat 295 mL of coffee from 25.0 0C to 62.0 0C? Assume that the coffee has the same density, 0.997 g/mL, and specific heat capacity, 4.184 rm J/(gc. K) .
A 36.4 L volume of methane gas is heated from 25 degrees celcius to 88 degrees celcius at constant pressure. What is the final volume of the gas?
At constant temperature and pressure, how many liters of oxygen would be needed to completely combust 0.350 L of propane?
How many grams of Ag2S can be generated from a mixture of 1.85 g Na2S and 3.58 g of AgNO3 given the following unbalanced reaction:
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