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If 0.420 mol of a nonvolatile nonelectrolyte are dissolved in 3.90 mol of water, what is the vapor pressure PH2O of the resulting solution? The vapor pressure of pure water is 23.8 torr at 25.0 degrees C. Express your answer numerically in torr.
lightbulb is visible light and that the average wavelength og the light is 550 nm, how many photons are emitted by the lightbuld each second?
At a certain temperature, the solubility of strontium arsenate, Sr3(AsO4)2, is 0.0690 g/L. What is the Ksp of this salt at this temperature
When 36.5 mL of 0.585 M H2SO4 is added to 36.5 mL of 1.17 M KOH in a coffee-cup calorimeter at 23.50°C, the temperature rises to 30.17°C. Calculate pH of this reaction.
How much heat is gained by copper when 51.8 g of copper is warmed from 15.5*C to 76.4*C? The specific heat of copper is 0.385 J/(g x *C)
Suppose that you wished to prepare copper(II) carbonate by a precipitation reaction involving Cu2+ and CO32-. Select all of the pairs of reactants that could be used as solutes
A 0.150 M NaCl solution is referred to as a physiological saline solution because it has the same concentration of salts as normal human blood. Calculate the mass of NaCl needed to prepare 275.0 mL of a physiological saline solution.
Identify the intermolecular attractions for dimethyl ether and for ethyl alcohol. Which molecule is expected to be more soluble in water?
Design an experiment to determine the density of irregular shaped object. a. Include an introduction describing the calculations that will need to be made.
What is the pH (to nearest 0.01 pH unit) of a solution prepared by mixing 87.0 mL of 0.0601 M NaOH and 71.0 mL of 0.0138 M Ba(OH)2
The half-life of a reaction, is the time it takes for the reactant concentration to decrease by half. For example, after one half-life the concentration falls from the initial concentration to, after a second half-life to, after a third half-life ..
Lactic acid (C3H6O3) which occurs in sour milk and foods such as sauerkraut, is a weak monoprotic acid.? The pH = 0.10 M solution of lactic acid is 2.43 What are the values of Ka and pKa for lactic acid
how will you use the known compounds that are out in the lab to help you find the identity of your unknown compounds
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