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A 5.50 g sample of an unknown is dissolved in 251. g of benzene. The freezing point of the solution is 1.02 C below the normal freezing point of pure benzene. What is the molecular weight of the unknown? (Note:] Kf for benzene = 5.21 C/m)
How many milliliters of 0.50 M HCl solution are needed to titrate 100 mL of 0.20 M NaF to the equivalence point
Draw one eclipsed and one staggered conformation of 2,3-dimethylpentane using: Newman projections that sights down the C2-C3 bond, Sawhorse projections that sights down
What must the heat rating of the heater, in kJ/min, to accomplish this? Ignore the heat that goes to the heat cup itself. The density of water is 0.997 g/ml.
If the density of water is 1.00g/mL, what is the weight in pounds of gallon of water? you may assume that mass and weight are equivalent at the earth's surface.
An iron bar of mass 781 g cools from 94°C to 5°C. Calculate the heat released (in kilojoules) by metal.
Enough of a monoprotic acid is dissolved in water to produce a 0.0194 M solution. The pH of the resulting solution is 6.26. Calculate the Ka for the acid.
You are a member of EPA enforcement team investigating the possible ongoing dumping of arsenic in Cavalier Lake. You take water samples from the middle of the lake and find that the concentration is 89.6 ppb. 10 days later you take another sample ..
what is the value of ni for an electron that emits a photon of wavelength 95.04 nm when it returns to grount state in a th H atom
Arrange the molecules in order of decreasing boiling point Molecules are methane, dimethyl ether
An automobile gasoline tank holds 47kg of gasoline. When the gasoline burns, 165kg of oxygen are consumed and carbon dioxide and water are produced.What is the total combined mass of carbon dioxide and water that is produced?
25.00 ml aliquots of thiis solution was titrated with monoprotic strong base NaOH (0.0800 M). The titre volume of NaOH was 40.00ml. Calculate the molecular weight of H2A.
A solution contains .10 M iodide ion, I- and 0.10 M carbonate ion, CO32-.... a. If solid Pb(NO3)2 is slowly added to the solution which salt will precipitate first, PbI2 or PbCO3? What will the concentration of the first ion that precipitates when..
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