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The vapor pressure of ethanol at 50 oC is 233 mm Hg, and its normal boiling point at 1atm is 78.3 oC. Calculate Hvap of ethanol.
Consider a sample of 3.5g of water, which has an equilibrium vapor pressure of 23.8 mmHg at 25.0 degC. If this sample is placed into a 6.00L flask, what mss of liquid water will remain when equilibrium is established
How many mole of hydrogen gas can be liberated from 85.5 moles of magnesium hydride if the process operates at 80% efficiency
To determine [Fe3+] in an unknown solution, 1.00 mL of the solution was diluted to 50.0 mL. After addition of excess SCN-, the absorption of the standard solution =0.193 at 580 nm. What is the [Fe3+]
If 8.8 mg of iodine-123 is used in an experiment, how many milligrams of iodine-123 should remain after 50 hours. Assume that iodine-123 has a half-life of 10 hours.
How many joules of heat are given off when 5 g of water cool from 75 degrees C to 25 degrees C?
A beaker with 160 mL of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 7.00 mL of a 0.410 M HCl solution to the beaker. How much will the pH..
D Radical-chain polymerization of CH2=CHOCOCH3, followed by base-catalyzed hydrolysis.
Calculate the number of moles of carbon dioxide in the final equilibrium system obtained by initially adding 1.00 mol of H2, 2.00 moles of CO2, 0.750 mol of H20, and 1.00 mol of CO to a 5.00 L reactor at 990 C.
The Ka value for boric acid is 5.8* 10^{-10}. What is the pH of an aqueous eye wash solution that is 1.3% boric acid by mass? Assume the density of the solution is the same as that of water.
What is the molecular mass of a gas that diffuses through a porous membrane 1.26 times faster than Kr
What is also produced when neon-20 is bombarded with an alpha particle to give oxygen-16
if it takes 1.0 g of solid NaOH to change the pH of the solution containing a strong acid from 1.00 to 2.00, how much solid NaOH would be needed to change the Ph of this solution from 2.00 to 3.00? Assume that there is no change in the volume of t..
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