101 Practice E3

101 Practice E3 - 1 Chem 101 Dr Nielson Name Practice Exam...

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Chem 101 Name ___________________________ Dr. Nielson Practice Exam 3 1 Calorie = 4.184 kJ o F = o C x (9/5)( o F/ o C) + 32 o F K = o C + 273.15 1 atm = 760 torr = 760 mmHg = 1.01325 bar = 14.7 psi N = 6.022137 x 10 23 mol -1 R = 8.31451 J K -1 mol -1 = 0.0820578 L atm K -1 mol -1 K w = 10 -14 1
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1. Circle the correct answer in each of the following statements. a. If the solute concentration of the surrounding solution is less than that within a cell, then the solution is (circle one) hypotonic / hypertonic . b. HNO 2 is a (circle one) weak / strong acid. c. The solubility of a gas in liquid (circle one) decreases / remains the same / increases as the temperature decreases. 2. Solve the following concentration problems. a. Calculate the m/v % of a solution that contains 55 grams of NaCl (58.44 g/mol) in 1.2 L of aqueous solution. Ans: _______________ b. A 10.0 mL sample of concentrated HNO 3 (15.8 M) is diluted to a final volume of 250.0 mL. What is the molarity of the final solution? Ans: _______________ 3. Circle any of the following that are strong electrolytes. KBr CH 3 CH 2 OH HCl BaSO 4 (an exception to the rule for sulfates) 4. a. Write the equilibrium expression (K eq ) for the reaction below.
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