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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).
Calculate the pH of a solution prepared by mixing 50mL of a 0.10 M CH3NH2 solution with 25mL of a .20M HCl solution. (Kb CH3NH2 = 4.4 x 10^-4)
A 1- flask is filled with 1.20 of argon at 25 . A sample of ethane vapor is added to the same flask until the total pressure is 1.45 .
For some enzyme reactions (for example, the hydrolysis of cAMP by phosphodiesterase in vertebrate retinal cones)the enzyme is present in large quantities,so that e0/s0 is not a small number.Fortunately,there is an alternate derivation of the Micha..
This solution is then analyzed for nitrate ion by adding iron (II) sulfate solution and more sulfuric acid, heating the test tube and its contents. The nitrate ion reaction is positive.
The following reaction is spontaneous only below 3000 K. What conclusions can be drawn regarding this reaction? A + B ® AB
how many grams of the compind potassium chloride must be dissolved in 200 grams of water to make a saturated solution at 60 C.
in certain cases calcium hydroxide and sulfuric acid react to produce calcium bisulfate and water. when 0.0720 mol
At a certain temperature, reaction has equilibrium constant (Kc) of 1.9 x10^19. Determine the equlibrium constant for the reaction based on this information at the same temperature.
How many grams of CaH2 (Molar Mass = 42.1 g/mol)are needed to generate 14.0 L of H2 gas if the pressure of H2 is 757 torr at 20.0°C
four different solutions containing bases are shown below. What are the relative strengths of the bases shown in I-IV? Explain your reasoning. Note: H2O molecules are not shown for clarity.
A packed tower is used to purify a gas containing 4 mole % of H2S. The total inlet gas flow to the tower is 75 kmol/h and the total inlet pure solvent flow to be used to absorb the H2S is 95 kmol /h.
At a constant pressure of 0.905 atm, a chemical reaction takes place in a cylindrical container with a movable piston having a diameter of 40.0 cm. During the reaction, the height of the piston drop is by 65.0 cm. (The volume of a cylinder is V ..
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