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In 1.0 atm of pure oxygen, the solubility of O2 (g) in water is 1.26 X 10^-3 M at 25.0 degrees C. The mole fraction of oxygen in air is .210. If the atmospheric pressure is .979 atm, what is the solubility of oxygen in air at 25.0 degrees C?
Determine the concentrations of BaBr2, Ba2 , and Br- in a solution prepared by dissolving 1.62 × 10-4 g BaBr2 in 1.50 L of water.
What is the molarity of a solution that is 7.00% by mass magnesium sulfate and has a density of 1.071.
A gaseous mixture contains 420.0 Torr of H2(g), 391.3 Torr of N2(g), and 79.5 Torr of Ar(g). Calculate the mole fraction, X, of each of these gases.
Atrazine is an herbicide widely used for corn and is a common groundwater pollutant in the corn-producing regions of the United States. The log Kow for atrazine is 2.65.
What differences might you expect in the comparative solubility of each of them in lipids? WHY?
Suppose you have a sample of sodium weighing 11.62 g. How many atoms of sodium are present in the sample?
Which of the following would be the best procedure for extracting acetaldehyde from an aqueous layer to the organic layer? a. Extracting the aqueous layer one time with 200 mL of the organic solvent.
At what temperature will a gas be at if you allow it to expand from an original 456 mL at 65 celcius to 3.4 L?
here A solution of a primary standard KHC8H4O4 was prepared by dissolving 0.4877g potassium hydrogen pthalate in 50 ml H2O. Titration with KOH required 23.84 ml to reach a phenopthalein end point . What is the molarity of KOH
Draw the most stable conformation of trans-1-isobutyl-4-methylcyclohexane in both the chair conformation and the wedge structure.
Some observations through an experiment shows that a gas sample of 115 mili litres has a mass of 0.170 grams at a pressure of 711mmHg and a temperature of 34 degree celsius. Determine the molar mass of the gas.
A sealed container holds 1.00 mole of helium and 2.00 moles of nitrogen at 30.0°C. When the total pressure of the mixture is 666 mm Hg, what is the partial pressure of the nitrogen? Provide an answer correct to 2 significant figures in mmHg.
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