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A 3.46 liter sample of a gas was collected over water on a day when the temperature was 21 degrees celsiusand the barometric pressure was 718 torr. The dry sample of gas had a mass of 4.20 g. At 21 degrees celsius the vapor pressure of water is 18.65 torr. What was the molecular weight of the gas?
A reaction has a rate constant of 0.0591 sec-1, how much of the compound (in mol/L) is left after 5.03 sec, if there was 0.770 mol/L at the start
A solution is colorless in phenolphthalein and blue in bromcresol green. Therefore we can conclude that the pH of the solution
A mixture of gases contains 0.290 mol CH4, 0.240 mol C2H6, and 0.300 mol C3H8. The total pressure is 1.40 atm. Calculate the partial pressure of the gases.
Crystalline silicon has a cubic structure. The unit cell edge length is 543 pm. The density of the solid is 2.33 g/cm3. Calculate the number of Si atoms in one unit cell.
Calculate the concentration of (C6H6O6)2- in an aqueous solution of .0619 M ascorbic acid, H2C6H6O6 (aq).
Use the octet rule to predict the formula of the simplest compound formed from hydrogen and selenium. Why
The mass of a cube of iron is 252 g. Iron has a density of 7.87 g/cm3. What is the mass of a cube of lead that has the same dimensions?
determine the partial pressures of each gases at equilibrium. b.determine the equilibrium constant at 350.15 K
would bromine be a more or less effective disinfectant and bleaching agent than chlorine
a certain liquid has dH(vap)=26.0kJ/mol. calculate the q,w,dH and dU when 0.50 mol is vaporized at 250K and 750torr
Check your gas chromatogrm for the presence of compounds other than isopentyl acetate. Explain the presence of any additional
Draw an ideal distillation curve (temperature vs. milliliters of distillate) for a 50:50 mixture of two miscible liquids. How might one achieve such an ideal distillation
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