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7. A solution is prepared by mixing 25 mL pentane (CsH12, d 0.63 g/mL) with 45...
A solution is prepared by mixing 25 mL (0.22 mol, 16 g) of pentane (the solute) with 45 mL (0.34 mol, 30 g) of hexane (the solvent). Assuming that the volumes add on mixing, answer questions 35-36 below. (35) What is the molarity of the pentane? [1] 3.1 mol/kg [2] 3.1 mol/L [3] 7.3 mol/kg [4] 7.3 mol/L [5] 45.8 mol/L (36) 25.00 cm3 of a 0.7892 mol.dm-3 solution of potassium hydroxide is transferred to an empty 350.00 cm3 volumetric...
A solution of antifreeze is prepared by mixing 21.0mL of ethylene glycol (d = 1.11 g/mL; molar mass = 62.07 g/mol) with 50.0 mL H2O (d = 1.00 g/mL) at 25°C. If the density of the antifreeze solution is 1.07 g/mL, what is its molarity (M)?
An solution of antifreeze is prepared by mixing 21.0mL of ethylene glycol (d = 1.11 g/mL; molar mass = 62.07 g/mol) with 50.0 mL H2O (d = 1.00 g/mL) at 25°C. If the density of the antifreeze solution is 1.07 g/mL, what is its molarity?
1. A solution is prepared by dissolving 20.2 mL CH,OH in 100.0 mL HO at 25 degrees Celsius. The final volume of the solution is 118.0 mL. The densities of CHOH and H,O are 0.782 g/mL and 1.00 g/mL, respectively. For this solution, calculate molality, molarity, mole fraction of each component and % by mass of each component. 2. A solution contains a mixture of pentane and hexane at room temperature. The solution has a vapor pressure of 258 torr....
3. The density of a 4.53 M NH, solution is 0.9651 g/mL Calculate the molality 4. Calculate the freezing and boiling points of a solution made by mixing 10.5 g magnesium iodide with 150.0 g water. 5. A solution prepared by dissolving 0.56 g of a non-ionic solute in 25.0 g benzene freezes at 4.45°C. What is the molar mass of the solute?
An automobile antifreeze mixture is made by mixing equal volumes of ethylene glycol (d=1.114 g/mL; M= 62.07 g/mol) and water (d=1.00 g/mL) at 20°C. The density of the mixture is 1.070 g/mL. Express the concentration of ethylene glycol as (a) volume percent I % v/v (b) mass percent % w/w (c) molarity м (d) molality (e) mole fraction
An automobile antifreeze mixture is made by mixing equal volumes of ethylene glycol (d=1.114 g/mL;M=62.07 g/mol) and water (d=1.00 g/mL) at 20°C. The density of the mixture is 1.070 g/mL. Express the concentration of ethylene glycol as (a) volume percent 50v/v (b) mass percent 52.05w/w (c) molarity 0.0089 (d) molality 0.0083 (e) mole fraction
0. 000 45) The concentration of urea in a solution prepared by dissolving 16 g of urea in 20 g of H2O is _% by mass. The molar mass of urea is 60.0 g/mol. A) 0.48 B) 0.44 C) 80 D) 0.80 E) 44 46) The concentration of a benzene solution prepared by mixing 11.0 g C6H6 with 38.0 g CCl4 is molal. A) 2.40 B) 3.71 C) 0.622 D) 0.508 E) 0.289 47) The mole fraction of He in...
The density of a 0.84 M aqueous sugar (C12H22O11) solution is 1.12 g/mL at 25°C. What is the molality? The molar mass of C12H22O11 = 342.3 g/mol. Dinitrogen tetroxide decomposes to produce nitrogen dioxide: N2O4 (g) ↔ 2 NO2 (g) Calculate the equilibrium constant for the reaction given the equilibrium concentrations at 100°C: [N2O4] = 0.800 M and [NO2] = 0.400 M
4) 440 pnts) A solution is prepared by mixing some volume of methanol (MM = 32.04 g/mol, d=0.792 g/mL, p = 94.0 torr) and acetone (MM=58.07 g/mol, d=0.784 g/mL, Pº = 240. torr) at room temperature. Assuming that the volumes additive on mixing. a) What is the mole fraction of acetone and methanol in solution if the number of acetone and methanol gas molecules above the solution are equal to one another? Assume ideal solution behavior.