Calculate the molality of urea in the solution
At 27 degrees celsius, the vapor pressure of pure water is 23.76 mmHg and that of an aqueous solution of urea is 22.99 mmHg. Calculate the molality of urea in the solution.
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What is the concentration of 0.44% Ba(OH)2 in terms of normality? How many milliliters of 22% w/v Na2SO4 would be required to prepare 500ml of a 0.5 N Na2SO4 solution?
Write equations describing the preparation of three isomeric primary alcohols of molecular formula C5H12O from alkenes.
The equilibrium pressure of H2 over solid uranium and uranium hydride, UH3, at 500 K is 139 Pa. Calculate the standard Gibbs energy of formation of UH3(s) at 500 K.
The equilibrium contant Kc for the reaction HF(aq)+H2O(l)-->H30+(aq) +F-(aq) is 3.5 x10^-4. What is the equilibrium concentration of H30+ if the initial concentration of HF is 1.0M.
Cis/trans isomers describe the position of functional group around double bond. Could you give an example of these functional group?
A sample of 40.0 ml of .1 M acetic acid is titrated with .150 M NaOH Ka = 1.8 x 10^-5 What volume of NaOH is used in the titration in order tor reach the equivalence point. What is molar concentration of acetate ion at equivalence point. What is p
Commercial grade HCL solutions are typically 39.0% (by mass) HCL in water. Determine the molality and molarity of the HCL, if the solution has a density of 1.20 g/ml.
Sodium hydroxide is slowly added to a 225 mL of a solution that is 3.0*10^-2 M Ba2+ and 1.5*10-3 M Cr3+. Which will precipitate first
A student separated the components of a 2.743 g sample of beach sand. The separation yielded 0.632 g sea salt, 0.456 g sea shells, and 1.352 g sand. (A) calculate the mass percent of each component in the original mixture. (B) Calculate the total
What is the pressure in atmospheres in a 50.0L balloon at 25?C filled pure hydrogen gas produced by the reaction of 45.9g of CaH2 with water? ( show all work) CaH2 + H2O ---> Ca(OH)2 + H2
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