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Arrange the following substances in order of increasing strength of intermolecular forces: H2O, He, I2, and N2
After the addition of the water, the volume is now 480 mL. To this solution, we add 20.0 mL of 5 molar NaOH. What is the pH of the buffer now. What would be the pH after an addition of 60.0 ml of the 5.00 molar NaOH was added to the solution formed..
Calculate the pH during the titration of 20.00 mL of 0.1000 M hydrazine N2H4(aq), with 0.1000 M HCl after 20.25 mL of the acid have been added. Kb of hydrazine = 1.7 x 10-6
before a plate is developed. What would happen if a plate were developed in a jar with an atmosphere not saturated with solvent vapor?
What is the pH at the stoichiometric point (end point) for the titration of 50 ml of 0.20 M methyl amine CH3NH2 (aq) with 0.20 M perchloric acid HClO4(aq)? For methyl amine (CH3NH2), Kb = 3.6 x 10^-4.
What mass of solid PbCl2(278.10 g/mol) is formed when 200 mL of .125 M Pb2+
a compound is composed of only C.H and O. the combustion of a 0.519-g sample of the compound yields 1.24g of CO2 and 0.255g of H2O.
An unidenti?ed organic compound X, containing C, H, and O was subjected to combustion analysis. When 228.4 mg of pure X was burned 627.4 mg of CO2 and 171.2 mg of H2O were obtained. Determine the simplest formula of the compound X?
Determine the empirical formula for a substance with the following composition
refer to the given equation as 4NH3(g) + 7O2(g) = 4NO2(g) + 6H2O(g) How many moles of ammonia will be required to produce 13.8 mol of water.
the water level in a graduated cylinder initially at 221 rises to 271 after a piece of lead is submerged. what is the
How much heat (in kJ ) is required to warm 12.0 grams of ice, initially at -12.0 Celsius, to steam at 112.0 Celsius? The heat capacity of ice is 2.09 J/g*Celsius and that of steam is 2.01 J/g*Celsius?
what is the molality of a solution prepared by dissolving 413 mg of kbr in 6.45 ml of water at 25.0 0c. the density of
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