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A graduated cylinder containing ethanol was inverted into a 0.0C slush of ethanol and a (corrected) volume of air of 3.0mL was left at the top. Assuming no ethanol evaportated at room temperatur, calculate the number of mols of air (n air) trapped in the graduated cylinder. Atompheric pressure was 750 mmHg
1) When the temperature of the ethanol bath was 50.0C (a corrected) volume of 6.0mL was left at the top
2) What was the pressure of air trapped (P air) in atm?
3) What was the vapor pressure of ethanol at that temperature in atm
The data below were taken to calibrate the instrument. An unknown protein sample gave an absorbance of 0.867. Calculate the mass (micrograms) of protein in the unknown.
A total of 2.00 moles of a compound is allowed to react in a foam coffee cup that contains 127g of water. The reaction caused the temperature of the water to rise from 21.0 to 24.7 celcius .
How many kilograms of sodium fluoride would be needed to treat a 8.00 x 10^7 gal reservoir
Consider a solution formed by mixing 51.0 mL of 0.100 M H2SO4, 27.0 mL of 0.100 M HOCl, 25.0 mL of 0.200 M NaOH, 25.0 mL of 0.100 M Ca(OH)2, and 10.0 mL of 0.150 M KOH. Calculate the pH of this solution.
Write a balanced net ionic equation for the following dissolution reaction: Zn(OH)2 in aqueous NH3 to form Zn(NH3)4 2+
In the following experiment, the water in the glass is stirred by slowly lowering a weight (m=3kg) through a series of pulleys. If the 3kg weight is lowered 10m, the stirrer spins, but eventually all of the kinetic energy of the stirrer is turned ..
The volume of a gas sample is 200L at 740 torr. what is its volume at 760 torr? Assume that the Temperature remains constant
which compunds moves to the aqueous NaOH? Provide the chemical reaction that occured when NaOH was added. Clearly indicate the different between ionic bond and covalent bond.
A solid mixture consists of 51.0 g ofKNO3 (potassium nitrate) and 9.0 gofK2SO4 (potassium sulfate). The mixture is added to 130g of water. If the solution described in the introduction is cooled to 0 degrees celsius
Calculate the vapor pressure of a solution prepared by dissolving 70.0 g of naphthalene, C10H8 (a nonvolatile nonelectrolyte), in 220.0 g of benzene, C6H6, at 20°C. Assume the solution is ideal. The vapor pressure of pure benzene is 74.6 torr at 2..
1. the decomposition of hcooh follows first-order kinetics.hco2hg -gt nbspco2g h2g how many seconds will it take for a
If 1000.0 mL of 1.5M sodium hydroxide is mixed with 1000.0mL of 1.5M hydrochloric acid, after the reaction is complete, what are the concentrations of all the ions remaining in the solution
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