ASO Table 2.1 Effect of Temperature on the Rate of Osmosis Temperature Initial Weight 5 Minutes 10 Minutes 60°C 17.667 19.559 20.429 15 Minutes 21.117 20 Minutes 21.630 Tap 21.661 22.438 23.105 23.346 24.517 Ice 17.665 23.157 23.536 24.048 24.392 Mass (grams) 0 LO 5 10 Time (minutes) 15 20
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- HSS Website X urse Home 5158&HEPID=6b9f9 b2f... 2 010 8 of 21 Review I Constants I Periodic Table actions. Part A 2AuCls (aq) 3Ni(s)3NIC!2 (aq) + 2Au(s) Express your answer as a chemical equation. Identify all of the phases in your answer. ΑΣφ ? Submit Request Answer Part B 2KI (aq) Br2 (1)-2KBr(aq) + I2 (s) Express your answer as a chemical equation. Identify all of the phases in your answer. ΑΣ P Pearson 019 Pearson Education Inc. All rights reserved. | Terms of Use | Privacy PolicyI Permissions Contact Us II F8 F5 F6 F7 F9 F10 F11 F12 & ) 6 7 8 9 0 delete Y U O P II +The partial molar volumes of propanone and trichloromethane in a mixture in which the mole fraction of CHCI3 is 0.4693 are 74.166 cm3 mol-1, and 80.235 cm3 mol-1, respectively. What is the volume of a solution of total mass 1.000 kg?Given that the solubility of any organic material in a given solvent is due to the intermolecular forces present between the solvent and solute, solvents like hexanes (the alkanes isomers of C6H14) are rarely used for extraction purposes. In the space provided here, suggest a reasonable explanation for this experimental observation.
- the partial molar volumes of acetone and chloroform in a mixture in which the mole fraction of CHCl3 is 0.4693 are 74.166cm3/mol and 80.235 cm3/mol, respectively. What is the volume of a solution of mass 1.000 kg?Constants | Periodic Table Eleanoron gas is a newly discovered toxic gas with a very noxious odour. A sample of Eleanoron is collected over water at a temperature of 310 K . A volume of 1.38 Lof gas is collected with a total pressure of 1,175 bar. The vapour pressure of water at 310 K is 46.12 mmHg Determine the partial pressure of the Eleanoron gas, in units of bar. Express your answer using four significant figures. P = 1.114 bar Submit Previous Answers Completed Part B The partial pressure of the Eleanoron gas is 1.114 bar. If the density of the gas at this temperature is 2.81 g· L, determine the the molar mass of Eleanoron gas. Express your answer to three significant figures. ? MM = g mol1Calculate the mass of ethylene glycol (C₂H6O₂) that must be added to 1.00 kg of ethanol (C₂H5OH) to reduce its vapor pressure by 11.0 torr at 35 °C. The vapor pressure of pure ethanol at 35 °C is 1.00 x 10² torr Express the mass in grams to three significant figures. V—| ΑΣΦ m = Submit Previous Answers Request Answer ? X Incorrect; Try Again; 2 attempts remaining g
- Assuming Pb3(PO4)2 has a solubility of x at 25 °C, the Ksp expressed in x at 25 °C is Ksp = 108x6 Ksp = 36x6 none of the choices Ksp = 36x³ | Ksp=54x3Osmotic pressures are often reported in units of atmospheres or mm Hg. The latter impliesthat the height of a column of liquid can be used as a measure of pressure. This is, in fact, thebasis of the torricellian barometer from which the units of “torr” come. The pressure, P, isrelated to the height of the column by:P = ρghwhere ρ is the density of the liquid, g is the acceleration due to gravity and h is the height. Whatwill be the height (in mm) of a column of aqueous solution with a density of 0.9987 g/mL, if theosmotic pressure of the solution at 25 °C is 1.4 mm Hg? The density of mercury at thistemperature is 13.8 g/mLThe partial molar volumes of propanone (acetone) and trichloromethane (chloroform) in a mixture in which the mole fraction of CHCl3 is 0.4693 are 74.166 cm3 mol−1 and 80.235 cm3 mol−1, respectively. What is the volume of a solution of mass 1.000 kg?
- State the standard (reference) concentration for substances in the following phases.(This question and the next 2 questions are breakdowns of the same question) A student John wanted to measure the molar mass of an unknown material (UM) via the boiling point change of a solvent. He chose a solvent, ethanol, that can dissolve the material and sugar. He wanted to use sugar (MW = 342.3 g/mol) as a reference sample to get an ebullioscopic constant for his system to reduce the effect of other measuring errors such as pressure, measuring errors, and impurity of the samples. He made 10 solutions each contain 100 g of ethanol and various amont of solute as list in the table. He fits the two sets of data and obtain the molar weight of the unknown materials. For this question answer the fitted boiling point of pure ethanol: ____ K. 4 sig. fig. Thre rest ? marks in the tale will be answered in the next two questions. Copy the data into Excel and use trendline to fit or calculate the average values for this and the next 2 questions. Sample # Sugar (g) B.P. (K) Sample # UM…Air is a mixture of several gases. The 10 most abundant of these gases are listed here along with their mole fractions and molar masses. Molar mass Component Mole fraction (g/mol) 28.013 31.998 39.948 44.0099 20.183 4.003 16.043 83.80 2.0159 Nitrogen 0.78084 Oxygen 0.20948 Argon 0.00934 Carbon dioxide 0.000375 Neon 0.00001818 Helium 0.00000524 Methane 0.000002 0.00000114 Krypton Hydrogen 0.0000005 Nitrous oxide 0.0000005 44.0128 Part A What mass of carbon dioxide is present in 1.00 m³ of dry air at a temperature of 19 °C and a pressure of 687 torr? Express your answer with the appropriate units. ▸ View Available Hint(s) 0 Value Submit Part B μᾶ O Submit μÀ Value 3 Calculate the mass percentage of oxygen in dry air. Express your answer with the appropriate units. ▸ View Available Hint(s) B Units ? Units ?
