Review questions - Review question: 1. How many atoms of...

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Review question: 1. How many atoms of hydrogen are present in 3.42 g of water? a) 1.02 10 24 b) 2.29 10 23 c) 1.14 10 23 d) 0.380 e) 4.12 10 24 2. Which of the following pieces of glassware is volumetric? a) Dropper b) Evaporating dish c) Volumetric flask d) 50 mL graduated cylinder e) Erlenmeyer flask 3. Which of the following statements is correct? a) In ANY amount of hypochlorous acid, 94.1 % of the mass will come from chlorine atoms b) In ANY amount of hypochlorous acid, there will be 1 atom of hydrogen c) In ANY amount of hypochlorous acid, there will be the same number of chlorine atoms as hydrogen atoms d) In ANY solution containing hypochlorous acid, there will be 1 mole of hypochlorous acid. e) None of the above is correct 4. The correct formula of hydrogen peroxide is a) OH b) H 3 O+ c) HO 2 d) H 2 O 2 e) H 2 O 5. Which of the following represents the smallest mass? a) 10 fg b) 10 ng c) 10,000 μ g d) 100 mg e) 1000 pg
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precipitate forms. Calculate how many grams of this precipitate will form from the reaction of 443.8 mL of a 0.010 M solution of ammonium bromide with an excess of a 0.200 M solution of lead(II) nitrate. Disregard significant figures in the alternatives. a) 16.29 grams b) 0.36 grams c) 0.81 grams d) 1.63 grams e) 1.23 grams 7. The oxidation number of Cr in the chromate ion is a) +2 b) +6 c) -6 d) +4 e) None of the above 8. You need to prepare 50.0 mL of a solution of potassium fluoride 0.58 M. How much potassium fluoride do you need? (Disregard the number of significant figures) a) 0.03 g b) 1.68 g c) 5.01 g d) 1684.90 g e) None of the above is correct 9. Which of the following is (are) considered correct lab procedure(s)? a) Design and test your own experiment b) Pour excess chemical back into its original container c) Use metallic clamps to hold test tubes d) Discard cracked glassware e) All the above 10. The oxidation number of Cl in the chlorite ion is a) -3 b) +5 c) -1 d) +3 e) None of the above
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This note was uploaded on 09/29/2009 for the course CHEM 1113 taught by Professor Powell during the Spring '09 term at Texas San Antonio.

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Review questions - Review question: 1. How many atoms of...

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