Calculate the freezing point of a solution made
Calculate the freezing point of a solution made by dissolving 3.50 g of potassium chloride (74.55 g/mol) in 100.0 g of water. Assume ideal behavior for the solution; Kf = 1.86°C/m.
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The concentration of iodine in sea water is 60. parts per billion by mass. If one assumes that the iodine exists in the form of iodide anions, what is the molarity of iodide in sea water?
A steel rod is used to transfer heat from a chamber at 300 K to a chamber at 250 K. Which of the following changes in the setup will result in the greatest increase in the rate of heat transfer?
Saccharin, one of the first non-nutritive sweeteners used in soft-drinks, is 500 times sweeter than sugar in dilute aqueous solutions. The solubility of saccharin is 1.00 gram per 290 mL of solution.
An airplane has a mass of 27,500 kg and takes off under the influence of a constant net force of 41,000 N. What is the net force that acts on the plane's 83 kg pilot?
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Dimethylglyoxime, DMG, is an organic compound used to test for aqueous nickel(II) ions. A solution prepared by dissolving 65.0 g of DMG in 375 g of ethanol boils at 80.3°C. What is the molar mass of DMG?
Diethyl ether has a vapor pressure of 400.0 torr at 18°C. When a sample of benzoic acid is dissolved in ether, the vapor pressure of the solution is 342 torr. What is the mole fraction of benzoic acid in the solution?
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