Quiz 1 CHEM

Quiz 1 CHEM - 1. (Points: 4) What concentration of chloride...

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1.  (Points: 4)      What concentration of chloride ion (in ppb) is present in 3.1 × 10 -8 M CaCl 2 (aq)? For very dilute aqueous solutions, you can assume the solution's density is 1.0 g/mL. The molar mass of CaCl 2 is 110.98 g/mol.   2.  (Points: 4)      What is the freezing point of a solution containing 4.78 grams naphthalene (molar mass = 128.2 g/mol) dissolved in 32.0 grams paradichlorobenzene? The freezing point of pure paradichlorobenzene is 53.0 ° C and the freezing point depression constant, K fp , is -7.10 ° C/ m . .   3.  (Points: 4)      Which of the following is an application of osmotic pressure? a.  salting meats for preservation b.  mixing water and ethylene glycol in antifreeze c.  pressurizing beverages with carbon dioxide d.  salting icy roads e.  using a pressure cooker to increase the boiling point of water   4 (Points: 4)      In which solvent should Na + have the most negative enthalpy of solvation? a.  CCl 4 b.  H 2 O c.  C 6 H 6
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d.  CS 2 e.  CH 3 OCH 3   5.   Which action(s) will decrease the equilibrium concentration of a non-reacting gas in water?
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1. decr easi ng  the  tem pera ture  of  the  wat er 2. decr easi ng  the  volu me  of  wat er 3. decr easi ng  the  pres sure  of  the  gas  abo ve  the  liqui d
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  6.  (Points: 4)      What is the molar mass of a nonpolar molecular compound if 5.52 grams dissolved in 36.0
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Quiz 1 CHEM - 1. (Points: 4) What concentration of chloride...

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