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J q r b the solubility of a gas in water decreases as

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\J' Q -- r- b. the solubility of a gas in water decreases as the water temperature increases. c. dissolving a solid in water is a physical change. d. solubility of most solids increases with temperature. 6. The freezing point of 1 M NaCl is than 0"C and the boiling point of the solution is than 100'C. Q)low".,lower 7.The properties described in question 6 are referred to as the c. higher, lower d. higher, higher properties of solutions. d. group b. lower, higher fhUieative b. collective c. joint
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Q encra[ anl flnntyticaf fEtementary fftembtry I I, q a ff 20 1 2 8. During the process of a dilution, a. the volume of solution 13. What concentration unit is necessary , a. molality b. molaritY 14. What concentration unit is necessary a. molarity b. molalitY Instructor W. Song which of the following quantity does not change? b. the amount of solvent d. the color of solution C.)h. amount of solute 9. What is the definition of osmotic pressure? a. It is the pressure of atoms in the reaction system when osmosis takes place' ih,It is the pressure one applies over the solvent to start osmosis process' c. It is the air pressure in the room when osmosis is taking place. d. It is the pressure that has to be applied over the solution in order to prevent osmosis from occurring. 10. The mole fraction of calcium chloride in an aqueous solution is0.0724. What is the percent mass of CaClz in the solution? a.4.46%o i t:32.5% c.7.24oh d.36.2% 11. A substance that conducts electricity when present in an aqueous solution is called a. a conductive compound b. a nonelectrolyte i. an electrolyle d. an electric compound 12. Which of the following aqueous solutions will freeze at the lowest temperature? a. 0.10 m KCI b. 0.20 m CoHrzOe (glucose; nonelectrolyte) r i: o. r 5 m srclz d. o.o5o m Alcl: for the calculation of boiling point elevation? c. mass fraction d. mole fraction for the calculation of vapor pressure lowering? 'C'i mole fraction d. mass fraction 15. The boiling point elevation constant for water is 0.52'C /m.
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