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The average osmotic pressure of seawater at 25 degree Celsius is approximately 30 atm. Assuming that seawater is a solution composed of NaCl and water with a salinity of 3.5%, calculate the molar mass of NaCl. The density of seawater is 1.022g/mL. (The salinity of the oceans is most often defined as the mass of salt per 1000 grams of seawater).
illustrate the decomposition of arenediazonium salts using a reaction mechanism and briefly explain why the decomposition produced formed is so reactive.
A mixture initially contains A ,B ,C and in the following concentrations:[A] = 0.700 ,[B] = 1.35 , and [C] = 0.700 . The following reaction occurs and equilibrium is established:
a compound is a weak acid with a pka of 7.4. you make 100 ml of a 1.0 m solution of this compound. the ph of the
Equal volumes of two strong acids are mixed. The pH of one is 3.80. The pH of the other is 4.80. What is the pH of the mixture
How many grams of Cu(OH)2 will precipitate when excess NaOH solution is added to 73.0 mL of 0.661 M CuBr2 solution
How many grams each of the following, per 1000g of water in your car radiation, are needed to give equal protection against freezing down to -10 degrees C? (a) Methyl alcohol, CH3OH (b.p. 65 deg C), (b) ethyl alcohol,
Phosphate buffer has 3 ionizable groups, with pKa's of 2.15, 7.2, and 12.45. A 1.20 M solution of this buffer (250 mL) is found to have a pH of 6.0. A biochemist adds 30 mL of 1.0 M NaOH to this buffer. What is the resultant pH?
How many moles of CO(NH2)2 are present in 145 g of water, if the freezing point of the solu- tion is -4.02?C? kf (water) = 1.86 K · kg/mol.
A 10.00 g sample of sucrose (C12H22O11) was dissolved in 200.0 g H2O. What will be the vapor pressure of this solution at 100C? Sucrose is non-disscociated, non-volatile solute.
A solution of Chloroform (CHCl3) and Acetone ((CH3)2CO) exhibits a negative deviation from Roult's law. The result implies that
The solubility of silver sulfate, Ag2SO4, in water has been determined to be 8.0 g/L. What is the solubility in 0.24 M sodium sulfate, Na2SO4
Consider the following first-order reaction: Reactant Product. This reaction has a half-life of 28.2 seconds. Calculate the rate constant.
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