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Question 4 2 pts A solution's mole fraction is 0.0588 in chloroform, CHC130), after being dissolved...
Question 4 2 pts A solution is 0.313 m dichloromethane, CH2Cl2(0), after being dissolved in diethyl ether, C4H100(1). Convert the concentration of the solution into the units given below. (Density of the solution = 0.795 g/mL.) Enter your answers in decimal form to 3 significant figures. Do not enter units since they are already provided. Molar M mole fraction: mass percent: %(m/m)
Question 3 2 pts A solution is made by mixing 1.42 g of methanol, CH2OH(1), with 592.mL of acetic acid, HC2H2O2(1). Calculate the concentration of the solute in the solution using the units given below. (Density of methanol = 0.792 g/mL. Density of acetic acid - 1.05 g/mL. Assume volumes mix additively.) Enter your answers in decimal form to 3 significant figures. Do not enter units since they are already provided. Molar: M molal: m mole fraction: mass percent: %(m/m)...
4a Calculate the molarity of an aqueous solution of sodium perchlorate with a solute mole fraction of 0.081 and a density, ρ = 1.078 g/mL. Report your answer to THREE significant figures. 4b Calculate the molarity of a 41.2% by mass aqueous solution of copper (I) sulfate with a density, ρ = 1.177 g/mL. Report your answer to THREE significant figures. 4c Calculate the mole fraction of the solute of a 4.211 m aqueous solution of cadmium (II) bromide with...
D Question 40 15 pts Calculate the mole fraction, molarity and molality of NH3 if it is in a solution composed of 30.6 g NH3 in 81.3 g of H20. The density of the solution is 0.982 g/mL and the density of water is 1.00 g/mL. (The molar mass for NH3 is 17 and 18 for H20). Answers are to be shown to 3 significant digits (X.XX or 0.XXX or XXX) 1. The mole fraction for NH3 is 2. The...
1. An aqueous solution has a mole fraction of 0.119 KOH. What is the molarity of the solution? Assume that the density of the solution is 1.15 g/mL. Enter your answer to three significant figures and in units of molarity. 2. Glycerol (C3H8O3, 92.1 g/mol) is a nonvolatile nonelectrolyte substance. Consider that you have an aqueous solution that contains 28.6 % glycerol by mass. If the vapor pressure of pure water is 23.8 torr at 25oC, what is the vapor...
Calculate the mole fraction of the solute of a 1.026 M aqueous solution of sodium phosphate with a density, ρ = 1.046 g/mL. Report your answer to THREE significant figures.
Calculate the mole fraction of the solute of a 3.184 M aqueous solution of potassium hydroxide with a density, ρ = 1.021 g/mL. Report your answer to THREE significant figures.
An aqueous solution has a mole fraction of solute of (3.660x10^-2). The density of the solution is (1.20x10^0) g/mL and the solute has a molar mass of (8.3800x10^1) g/mol. What is the Molarity of solute of this solution? Enter your answer in scientific notation with 3 sig figs. Do not include any units in your answer. Do not round any intermediate calculations. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answer
The actual concentration was found to be 0.002364 M.
4. Knowing that 1 mole of dissolved oxygen ends up reacting with 4 moles of the titrant S2032, how do you calculate the amount of dissolved oxygen (in units of mg/L) from the volume of titrant added? Show your work. (2.5 pts) • Use X (mL) as your total volume of titrant added. • Use the actual concentration of the -0.0025 M NazS2O3 solution used during the titration (calculated in question...
Hello guys I want help to solve those question please !
Calculate the mole fraction of phosphoric acid (H3PO4) in a
26.6% (by mass) aqueous solution.
What is the freezing point (°C) of a solution prepared by
dissolving 11.3 g of Ca(NO3)2 in 115 g of water?
The molal freezing point depression constant for water is
The concentration of CO2 in a soft drink bottled with a partial
pressure of CO2 of 4.0 atm over the liquid at 25 °C...