Untitled - Kelly Walsh High School

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Nuclear Chemistry 303 1. A typical periodic table always lists which of the following? (There may be more than one correct answer.) a. chemical symbol b. atomic number c. mass number d. atomic weight e. physical state 2. Two atoms with the same number of protons but different numbers of neutrons are examples of ______ of an element. 3. Write symbols for each of the following. a. alpha particle b. beta particle c. gamma ray d. positron e. electron f. proton g. neutron 4. Balance the following nuclear equations. Gamma rays are not necessary. 137 137 a. 58Ce _____ l 57La 205 205 b. 80Hg l 81Tl _____ 245 241 c. 96Cm l 94Pu _____ 256 4 d. 103Lr l _____ 2He 238 1 e. 92U 0n l _____ 5. If 6.25 % of a radioactive isotope remains after 40 days, what is the half-life of the isotope? 6. a. Define fission. b. Define fusion. 7. The mass defect for helium-4 is 0.0304 g/mol. Determine the nuclear binding energy in joules per mole for 1 mol of helium-4. 8. The half-life of krypton-85 is 10.76 years. What percentage of a sample of krypton-85 will remain after 21.52 years? 9. After 182 min, the amount of arsenic-78 in a particular sample has decreased from 5.00 mg to 1.25 mg. What is the half-life of arsenic-78? 10. A sample of hair from an Egyptian mummy gives off radiation from carbon-14 at a rate of 58.2 % of a present day sample. How old is the mummy if the half-life of carbon-14 is 5730 years? ANSWER KEY 1. a, b, and d. 2. isotopes 3. a. 4 4 2a or 2He 0 0 b. 1b or 1e 0 c. g or 0g d. 0 0 1b or 1e 0 e. 1e 1 1 f. 1p or 1H 1 g. 0n 0 4. a. 1e 5. 10 days 0 b. 1b 4 4 c. 2He or 2a 252 d. 101Md 239 e. 92U 6. a. Nuclear fission is the breakdown of a nucleus into two or more smaller nuclei with the release of energy. b. Fusion is the combining of lighter nuclei into a heavier one.
304 CHEMISTRY FOR THE UTTERLY CONFUSED 7. E mc2 (0.0304 g/mol) (1 kg/103 g) (3.00 108 m/s) 2 (1 J/(kgm2 /s2 ) 2.74 1012 J/mol 8. 50.00 % (this is after one half-life) 9. This is after two half-lives, so t1/2 182 min/2 91.0 min 10. k (ln 2)/t1/2 1.209424 104 y1 (unrounded) t 4.48 103 58.2 % ln a 100.0 % years b 1.209424 104 y1 ln a Nt b N0 k
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Chemistry for the Utterly Confused
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We would like to dedicate this book
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Contents ix Chapter 5 Gases 79 Do I
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Contents xi Get Started 146 10-1 Mo
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Contents xiii 15-4 pH 222 15-5 Acid
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Contents xv Chapter 20 Nuclear Chem
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CHAPTER 1 ◆◆◆◆◆◆◆◆
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Chemistry: First Steps 3 compound b
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Chemistry: First Steps 5 exact norm
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Chemistry: First Steps 7 We now nee
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Chemistry: First Steps 9 mathematic
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Chemistry: First Steps 11 we do not
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Chemistry: First Steps 13 19. How m
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CHAPTER 2 ◆◆◆◆◆◆◆◆
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Atoms, Ions, and Molecules 17 Caref
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Atoms, Ions, and Molecules 19 table
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Atoms, Ions, and Molecules 21 If a
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Atoms, Ions, and Molecules 23 Once
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Atoms, Ions, and Molecules 25 and n
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Atoms, Ions, and Molecules 27 1. Th
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Atoms, Ions, and Molecules 29 20. N
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CHAPTER 3 ◆◆◆◆◆◆◆◆
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Mass, Moles, and Equations 33 Caref
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Mass, Moles, and Equations 35 Quick
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Mass, Moles, and Equations 41 Caref
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Mass, Moles, and Equations 43 the b
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Mass, Moles, and Equations 45 7. Th
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Mass, Moles, and Equations 47 17. a
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CHAPTER 4 ◆◆◆◆◆◆◆◆
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Aqueous Solutions 51 4-2 Solubility
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Aqueous Solutions 53 Don’t Forget
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Aqueous Solutions 55 Quick Tip Cert
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Aqueous Solutions 57 Quick Tip Quic
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Aqueous Solutions 63 Quick Tip Mg(N
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Aqueous Solutions 65 All the separa
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Aqueous Solutions 69 There will be
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Aqueous Solutions 75 The calculatio
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Aqueous Solutions 77 25. The titrat
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CHAPTER 5 ◆◆◆◆◆◆◆◆
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Gases 81 Quick Tip Don’t Forget!
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Gases 83 Quick Tip Let’s see how
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Gases 85 Don’t Forget! Quick Tip
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Gases 87 Second, the KMT relates th
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Gases 89 The larger the gas particl
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Gases 91 Note that the mandatory co
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Gases 93 If it was not clear before
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Gases 95 ANSWER KEY 1. PTotal PA
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CHAPTER 6 ◆◆◆◆◆◆◆◆
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Thermochemistry 99 Quick Tip Don’
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Thermochemistry 101 Don’t Forget!
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Thermochemistry 103 C2H2(g) (5/2) O
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Thermochemistry 105 Quick Tip Some
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CHAPTER 7 ◆◆◆◆◆◆◆◆
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Quantum Theory and Electrons 109 Al
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Quantum Theory and Electrons 111 Th
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Quantum Theory and Electrons 113 Do
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Quantum Theory and Electrons 115 Do
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Quantum Theory and Electrons 117 AN
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CHAPTER 8 ◆◆◆◆◆◆◆◆
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Periodic Trends 121 8-2 Ionization
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Periodic Trends 123 The general tre
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Periodic Trends 125 in its ground s
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CHAPTER 9 ◆◆◆◆◆◆◆◆
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Chemical Bonding 129 Quick Tip In S
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Chemical Bonding 131 9-3 Ionic Bond
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Chemical Bonding 133 Quick Tip Neve
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Chemical Bonding 135 Don’t Forget
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Chemical Bonding 137 9-6 Bond Energ
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Chemical Bonding 139 Quick Tip invo
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Chemical Bonding 141 Quick Tip Elem
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Chemical Bonding 143 11. a 12. b 13
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CHAPTER 10 ◆◆◆◆◆◆◆◆
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Molecular Geometry and Hybridizatio
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CHAPTER 11 ◆◆◆◆◆◆◆◆
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Intermolecular Forces, Solids and L
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CHAPTER 12 ◆◆◆◆◆◆◆◆
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Solutions 173 ways of expressing th
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Solutions 175 Don’t Forget! Don
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Solutions 177 12-3 Colligative Prop
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Solutions 179 Just as the freezing
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Solutions 181 Don’t Forget! Using
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Solutions 183 Quick Tip A molar mas
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Solutions 185 3. All methods of num
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CHAPTER 13 ◆◆◆◆◆◆◆◆
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Kinetics 189 4. Physical state of r
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Kinetics 191 Don’t Forget! consta
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Kinetics 193 Don’t Forget! the co
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Kinetics 195 Quick Tip Careful! Rem
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Kinetics 197 The decomposition of h
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Kinetics 199 reaction is first orde
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Kinetics 201 energy of a reaction.
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CHAPTER 14 ◆◆◆◆◆◆◆◆
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Chemical Equilibria 205 Quick Tip D
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Chemical Equilibria 207 14-3 Le Ch
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Chemical Equilibria 209 Given the f
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Chemical Equilibria 211 Careful! Do
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Chemical Equilibria 213 Quick Tip F
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Chemical Equilibria 215 Quick Tip I
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Chemical Equilibria 217 10. Write K
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CHAPTER 15 ◆◆◆◆◆◆◆◆
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Acids and Bases 221 Don’t Forget!
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Acids and Bases 223 The pH of pure
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Acids and Bases 225 Quick Tip Quick
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Acids and Bases 227 15-7 Lewis Acid
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Acids and Bases 229 We do not have
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Acids and Bases 231 Quick Tip We ne
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Acids and Bases 233 2. Alkali metal
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CHAPTER 16 ◆◆◆◆◆◆◆◆
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Buffers and Other Equilibria 237 we
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Buffers and Other Equilibria 239 Do
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Buffers and Other Equilibria 241 16
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Buffers and Other Equilibria 243 Qu
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Buffers and Other Equilibria 245 Qu
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Buffers and Other Equilibria 247 pK
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Buffers and Other Equilibria 249 Th
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CHAPTER 17 ◆◆◆◆◆◆◆◆
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Page 290 and 291: Electrochemistry 267 Quick Tip Some
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Page 316 and 317: Nuclear Chemistry 293 The sum of th
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Page 330 and 331: Organic, Biochemistry, and Polymers
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Page 350 and 351: Index 327 chemical formulas, 19-21
Page 352 and 353: Index 329 Gibbs free energy (G), 25
Page 354 and 355: Index 331 octet rule, 128, 135, 140
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Untitled - Kelly Walsh High School

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