3. What is the mole fraction of urea in a solution that contains 2.0 mol of...
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...
what is the mole fraction of urea, CH4N2O, in an aqueous solution that is 59% urea by mass?
Answer all please What is the mole fraction of I_2 in a solution made by dissolving 55.6 g of I_2 in 245 g of hexane, C_6H_14? (MM I_2 = 253.81 g/mol and MM Hexane = 86.18 g/mol) A) 0.0715 B)0.0770 C) 0.133 D) 0.154 What is the mole fraction of oxygen in a gas mixture that is 3.7g in oxygen (MM O_2 = 32.0 g/mol) and 6.3g in nitrogen (MM N_2 = 28.0 g/mol) by mass? A) 0.34 B) 0.37...
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?
1.What is the mole fraction of MgCl2 (MM=95.21 g/mole) in an aqueous solution that is 5.80 m MgCl2? A. 0.104 B. 0.0946 C. 0.356 D. 0.553 E. none of these 2. A solution contains 0.144m Na2SO4 and has a measured freezing point of -0.606 degree celcius. What is the value of the Van’t Hoff factor, i? The freezing point depression constant for water is -1.86 degree celcius/m. A. 3 B.0.326 C.2.26 D. 3.07. E. Cannot be determined 3.The vapor pressure...
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
g of solution. What is the mole fraction of of a 3 mol/dm3 concentration and 1.073 g/cm' density sodium chloride solution? (0.0567) I..Llit of sodium hydrogen carbonate at 20 °C, if 100 g solution . A+ 60 °C. 100
What is the mole fraction of ethanol in a solution made by dissolving 14.6g of ethanol, C2H5OH, in 53.6g of water? A) 0.106 B) 0.214 C) 0.0964 D) 0.272 Please show your work!!!!!!!!!!!! :)
A gas mixture contains 0.165 mol C2H6(g) and 0.233 mol O2(g). What is the mole fraction of O2(g) in the mixture
A certain hydrochloric acid solution has a mole fraction of 0.23 HCI. the density of this solution is 1.18g/mL a. how many moles of HCI are in 1 mole of solution? b. what is the weight percent of HCI in this solution? c. what is the molarity of HCI in this solution? d what is the molality of HCI in this solution? e. what is the weight percent of water in this solution? f. what is the mole fraction of...