Unit Four Self-Assessment Questions.docx

A 1 mol b 3 mol c 15 mol d 17 mol 5 how many moles of

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a) 1 mol b) 3 mol c) 15 mol d) 17 mol 5) How many moles of hydrogen atoms are present in 2.00 mol of water? a) 2.00 mol b) 4.00 mol c) 6.00 mol d) 8.00 mol 6) Sodium chloride, by mass, is
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Unit Four Test on March 10, 2017 a) About 40% Na + and 60% Cl - b) 50% Na + and 50% Cl - c) About 60% Na + and 40% Cl - d) 23.0% Na + and 35.5% Cl - Section Four 1) The mass of 4.65 mol H 2 SO 4 is a) 314 g b) 456 g c) 466 g d) 564 g 2) For which of the following would a 10.0-g sample contain the most moles? a) Co b) F c) Se d) P 3) How many moles of CO 2 are there in 1 lb. (453.6 g) CO 2 ? a) 0.0969 mol b) 9.20 mol c) 10.3 mol d) 14.2 mol 4) How many moles of benzene (C 6 H 6 ) are there in a 7.8-g sample of benzene? a) 0.100 mol b) 1.00 mol c) 7.81 mol d) 610 mol Items 5-7 refer to the equation 2 H 2 + O 2 2 H 2 O 5) At the molar level, the equation means that a) 2 mol H react with 1 mol O to form 2 mol H 2 O b) 4 mol H react with 2 mol O to form 4 mol H 2 O c) 2 mol H 2 react with 1 mol O 2 to form 2 mol H 2 O d) 2 mol O 2 react with 1 mol H 2 to orm 2 mol H 2 O 6) How many moles of water can be formed from 0.500 mol H 2 ? a) 0.500 mol b) 1.00 mol c) 2.00 mol d) 4.00 mol 7) How many moles of oxygen (O 2 ) are required to form 0.222 mol H 2 O? a) 0.111 mol b) 0.222 mol c) 0.444 mol d) 1.00 mol Section Five 1) In a solution of 85.0 g water and 5.0 g sucrose (C 12 H 22 O 11 ), the
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Unit Four Test on March 10, 2017 a) Solute is sucrose and the solution is the solvent b) Solute is sucrose and the solvent is water c) Solute is water and sucrose is the solvent d) Water and sucrose are both solutes 2) What is the molarity of a sodium hydroxide solution having 0.500 mol NaOH in 62.5 mL of solution? a) 0.00200 M b) 0.200 M c) 2.00 M d) 8.00 M 3) How many moles of sugar are required to make 2.00 L of 0.600 M sugar solution? a) 1.20 mol b) 2.40 mol c) 24.0 mol d) 6.67 mol 4) What mass of NaCl in grams is needed to prepare 2.500 L of a 0.800 M NaCl solution? a) 2.00 g b) 4.00 g c) 58.5 g d) 117 g 5) What volume of 6.00 M HCl solution contains 1.80 mol HCl? a) 250 mL b) 300 mL c) 900 mL d) 9.00 L 6) What is the percent by volume of ethanol in a solution made by adding 50.0 mL of pure ethanol to enough water to make 250 mL of solution? a) 16.7% b) 20.0% c) 25.0% d) 80.0% 7) A solution contains 15.0 g sucrose and 60.0 g water. What is the percent by mass of sucrose in the solution? a) 15.0% b) 20.0% c) 25.0% d) 80.0% 8) What volume of water should be added to 23.4 g NaCl to make 100.0 mL of 4.00 M NaCl solution? a) 76.6 mL b) 96.0 mL c) 100.0 mL d) enough to make 100.0 mL of solution Chapter Six Section One
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Unit Four Test on March 10, 2017 1) Molecules are farthest apart in a(n) a) Ionic solid b) Covalent solid c) Liquid d) Gas 2) Liquids are a) Difficult to compress and have no definite shape b) Difficult to compress and have no definite volume c) Easy to compress and have a definite shape d)
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