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what is the mole fraction of urea, CH4N2O, in an aqueous solution that is 59% urea...
7. What is the mole fraction of urea, CH4N2O, in an aqueous solution that is 46% urea by mass? 8. What volume of a 0.850 M solution of CaCl2 contains 1.28 g of solute? 9. The volume of a 27.0% (by mass) solution is 162.9 mL. The density of the solution is 1.128 g/mL. What is the mass of solute in this solution? 10. Concentrated sodium hydroxide is 19.4 M and has a density of 1.54 g/mL. What is the...
The vapor pressure of an aqueous solution of urea, CH4N2O, is 291.2 mm Hg. The vapor pressure of water at this temperature is 355.1 mm Hg. Calculate the mole fraction of urea in this solution. a. 0.180 b. 0.220 c. 0.500 d. 0.820 e. 1.22 please show all work
Find the mass of urea (CH4N2O) needed to prepare 51.3 g of a solution in water in which the mole fraction of urea is 7.53×10−2.
Find the mass of urea (CH4N2O) needed to prepare 51.3 g of a solution in water in which the mole fraction of urea is 7.66×10−2.
The industrially important chemical, urea [CH4N2O; molar mass = 60.0 grams per mole], is prepared from the reaction of ammonia [NH3: molar mass = 17.0 grams per mole] with carbon dioxide [CO2; molar mass = 44.0 grams per mole] according to the following: 2 NH3 + CO2 CH4N2O + H2O If one reacts 132.0 grams of CO2 with 136.0 grams of ammonia, which of these would be the limiting reagent?
3. What is the mole fraction of urea in a solution that contains 2.0 mol of urea and 5.4 mol of water? 1.0.27 b. 0.37 c. 0.77 d. 0.73 e. 0.47 work? - 12
An aqueous solution is 34.0% by mass ethanol, CH3CH2OH. The mole fraction of ethanol in the solution is ? The mole fraction of nickel(II) bromide, NiBr2, in an aqueous solution is 2.00×10-2. The percent by mass of nickel(II) bromide in the solution is? The molality of potassium bromide, KBr, in an aqueous solution is 2.44 mol/kg. What is the mole fraction of potassium bromide in the solution?
Chemistry (6 points) What is the mole fraction of urea, CO(NH2)2, in a solution prepared by dissolving 6.8 g of urea in 33.5 g of methanol, CH3OH?
In a 70.0g aqueous solution of methanol, CH4O, the mole fraction of methanol is 0.310. What is the mass of each component?
What is the mole fraction of phosphoric acid (H3PO4) in a 25.4% (by mass) aqueous solution of the acid? Enter your answer with four decimal places and no units.