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You are give a sample of aqueous sodium chloride solution with an unknown concentration. You measure its osmotic pressure in an osmometer at 2.746 atm at 25 degrees C. What is the concentration of the sodium cloride solution in units of g/L?
A student attempted to identify an unknown compound by the method used in this experiment. she found that when she heated a sample weighing 0.4826 g, the mass barely changed
The following question refers to a solution that contains 1.48M hydrofluoric acid, HF (Ka = 7.2 x 10^-4) and 3.00M hydrocyanic acid, HCN (Ka= 6.2x 10^-10). What is the pH of this mixture of weak acids.
what mass of magnesium chloride is needed to react with 145 grams of silver nitrate according to the following reaction: MgCl2+2AgNO3=Mg(NO3)2+2AgCl?
how many kj of energy are required to convert 171 grams of water liquid at 100degc to steam at 114degc? the following
The vapor pressure of pure ethanol is 56 torr. if a solution prepared from 560.0 g of methanol and 210.0 g of ethanol has a vapor pressure of .31 atm over the soultion.
Calculate the proton motive force across the inner mitochondrial membrane at 25C when the electrical is 0.018V (inside negative) and the pH outside is 6.3 and the pH inside is 7.2
Determine the partial pressure and the total pressure using Dalton's law of partial pressures - Determine the total pressure of the mixture.
Suppose an ice cube weighing 44.7 g at a temperature of -4 degree celcius is placed in 550 grams of water at a temperature of 23 degrees celcius.
what is the concentration in the solution of the first ion when the second one starts to precipitate at 25 C?
A standard l00-ppm quinine solution registered 125 when measured under conditions identical to those for the diluted sample. Calculate the mass in milligrams of quinine in the tablet.
would a given amount of flourine react with different masses of the two hydrogen isotopes? Does this violate the law of definite proportions.
A multiple stage evaporate process concentrates a weak solution of LiOH from 4.48 wt% to 26.78wt%. This evaporator processes 10 metric tonnes of solution each day.
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