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exam1fall2011f1 - GeneralChemistryI exam1 R.LopezdelaVega...

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General Chemistry I exam 1 4/22/2011 R. Lopez de la Vega Name_____________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Which of the following compounds will be most soluble in pentane (C 5 H 12 )? A) benzene (C 6 H 6 ) B) ethyl methyl ketone (CH 3 CH 2 COCH 3 ) C) acetic acid (CH 3 CO 2 H) D) pentanol (CH 3 CH 2 CH 2 CH 2 CH 2 OH) E) None of these compounds should be soluble in pentane. 1) 2) A solution containing less than the equilibrium amount is called __________. 2) 3) Determine the solubility of CO 2 in soda water at 25°C if the pressure of CO 2 is 5.2 atm. The Henry ʹ s law constant for carbon dioxide in water at this temperature is 3.4 × 10 - 2 M/atm. 3) 4) Which of the following concentration units are temperature dependent? 4) 5) Calculate the molality of a solution formed by dissolving 27.8 g of LiI in 500.0 mL of water. A) 0.394 m B) 0.556 m C) 0.241 m D) 0.254 m E) 0.415 m 5) 6) What mass of NaCl is contained in 24.88 g of a 15.00% by mass solution of NaCl in water? 6)
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