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In moist air the lighter water molecules have a greater rms average speed than the heavier nitrogen molecules. Compute the difference in the two average speeds at 30C
What was the volume of the aluminum cylinder in cm3? The mass of the aluminum cylinder was determined to be 30.1 grams. What is the density of the aluminum?
3.00 mole of Ne has a total pressure of 24.5 atm at 25 degrees C. How many moles of He are in the flask?
the heat of fusion of ice at this temperature is 5610 J/mol. Find entropy change of the universe when 3mol of water freezes at -10degreesC
Calculate Qsp for calcium fluoride (Ksp=3.9x10^-11) when 195.0 mL of a 0.00780 M solution of Ca(NO3)2 is added to 175.0 mL of a 0.00740 M solution of KF
If a student weighed out a 500. mg tablet of vitamin C, measured to the nearest 0.001g and recovered 0.254g of ascorbic acid. What is the percent mass of vitamin C in the tablet
Calculate [OH] for a solution formed by adding 5.00 mL of 0.140M KOH to 15.0 mL of 9.0×10-2M Ca(OH)2.
A full 50.0 L He cylinder that is attached to a gas chromatograph contains 1.20 kg of the gas. During transport, the temperature of the cylinder may vary from 0ºC to 40ºC. What minimum pressure must the tank be able to sustain
How much work must be done to bring ion A and ion B together into an activated complex. The charge of ion A is +2 and it's ionic radius is 2.85 A and if the charge on ion B is +1 and it's ionic radius is 1.35 A
What is the approximate value of the equilibrium constant, Kn, for the neutralization of hydrochloric acid with sodium hydroxide, shown in the equation below
you wish to make a 0.355 m hydrobromic acid solution from a stock solution of 3.00 m hydrobromic acid. how much
In an equilibrium mixture of the three gases, the partial pressures of SO2Cl2 and SO2 are 3.31 atm and 1.59 atm, respectively. What is the partial pressure of Cl2 in the equilibrium mixture?
How many grams of water at 0 degrees C could be frozen to ice at 0 degrees C by the evaporation of 58.82 mol NH3?
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