11) A sweetened cup of coffee is an example of a: A) heterogeneous mixture B) homogeneous mixture C) solid solution D) pure liquid E) gaseous solute in a liquid solvent 12) A solid solution of zinc in copper is an example of: A) a solvent B) a solute C) the U.S. five-cent nickel D) a non-uniform solute E) an alloy 13) A solution prepared by dissolving 4.00 g KCl in 36.0 g H2O is said to be: A) 11.1% KCl by mass B) 0.100% KCl by mass C) 0.111% KCl by mass D) 10.0% KCl by mass E) 9.00% KCl by mass 14) Which definition is INCORRECT? A) mole fraction = moles of solute/moles of solution B) molality = moles of solute/kilogram of solvent C) weight percent = grams of solute/100 grams of solution D) molarity = moles of solute/liter of solution E) volume percent=volume of solute/volume of solution 15) An aqueous solution containing 1.0 g ephedrine in 20.0 mL solution is said to be: A) 5.0% ephedrine (mass/vol) B) 1.0% ephedrine (mass/vol) C) 0.50% ephedrine (mass/vol) D) 0.050% ephedrine (mass/vol) E) 20.0% ephedrine (mass/vol) 16) A 1.00 molal solution of NaCl in water contains: A) 1.00 g NaCl per 1000.0 g H2O B) 1.00 mol NaCl per 1000.0 g H2O C) 1.00 mol NaCl per 1000.0 kg H2O D) 1000.0 g NaCl per 1000.0 g H2O E) 1.00 mol NaCl per 1000.0 mol H2O 17) A magnesium sulfate heptahydrate solution, which is 18.00% by weight in the anhydrous compound, has a density at 20°C of 1.20 g/mL. What is the molality of the anhydrous compound in the solution? (Atomic weights: H = 1.0, O = 16.0, S = 32.1, Mg = 24.3) A) 5.54 M B) 1.79 M C) 1.82 M D) 1.25 M E) 1.49 M 18) Liquid Q is a polar solvent and liquid R is a nonpolar solvent. On the basis of this information, you would expect: A) both liquids to be miscible with a third liquid T B) liquid Q to be miscible with liquid R C) NaCl to be soluble to both Q and R D) liquid Q and H2O to be miscible E) liquid R and H2O to be miscible 19) Which of the following pairs are more likely to form a solution? A) chloroform (CHCl3) and acetone (CH3COCH3) B) water and octane (C8H18) C) methanol (CH3OH) and hexane (C6H14) D) water and octyl alcohol (C8H17OH) E) acetone (CH3COCH3) and octane (C8H13) 20) Which compound is most likely to be soluble in water? A) butyl alcohol (CH3CH2CH2CH2OH) B) ethylene glycol (HOCH2CH2OH) C) hexane (C6H14) D) benzene (C6H12) E) iodine (I2)