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Chapter 1 HW Solutions

Chapter 1 HW Solutions. Ch 1.1 – 1.3. #2 A) solid B) gas C) liquid D) gas. #4. A) homogeneous mixture B) heterogeneous mixture C) pure substance D) mixture (hetero vs. homo can’t be determined by visual inspection). #8. A) Be B) Cs C) F D) Mn E) As F) Xe G) P H) Sc. #10. A) Barium

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Chapter 1 HW Solutions

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  1. Chapter 1 HW Solutions

  2. Ch 1.1 – 1.3 • #2 • A) solid • B) gas • C) liquid • D) gas

  3. #4 • A) homogeneous mixture • B) heterogeneous mixture • C) pure substance • D) mixture (hetero vs. homo can’t be determined by visual inspection)

  4. #8 • A) Be B) Cs C) F • D) Mn E) As F) Xe G) P • H) Sc

  5. #10 • A) Barium • B) Californium • C) Molybdenum • D) Selenium E) Thallium • F) Vanadium G) Gold • H) Zirconium

  6. #11 • A is a compound – rationale CO2 produced • B is probably compound because it is a white solid

  7. Ch1.4 – 1.6 • #18a

  8. 18b

  9. 18 c, d, e

  10. 18 f, g

  11. #20

  12. #24 • Vol = length3; density = mass/vol

  13. #27 • Thickness=volume/area

  14. CH 1.7 – 1.9

  15. #34 • A) 4 • B) 3 • C) ambiguous 5,6, or 7 • D) 6 • E) 6

  16. #36 • A) 1.44 X 105 • B) 9.75 X 102 • C) 8.90 X 105 • D) 6.76 X 104 • E) 3.40 X 104 • F) –6.56

  17. #38 • A) -2.3 X 103 • B) 8.260 X 107 • C) 3.4 X 104 • D) 7.62 X 105

  18. #41

  19. #43 a-d

  20. #43 e & f

  21. #45

  22. Chapter 2 HW Solutions

  23. 2.1 – 2.3 • #2 • 6.500 g compound - .384 g H = 6.116g S • Conservation of Mass • Atoms are not created or destroyed so if a compound has only H and S and .384 grams is H the rest must be sulfur

  24. #4 integer ratio indicates combining F units that are indivisible

  25. #5 • Evidence that cathode rays were negatively charged was the electric and magnetic field deflected the ray the same way it would a negative charge and that the negative plate exposed to the cathode rays acquired a negative charge.

  26. #11

  27. #14 • A) 32P has 15 p, 17n, 15 e • B) 51Cr has 24p, 27n • C) 60Co has 27 p, 33 n

  28. Ch 2.4 – 2.5 • #20 • A) Lithium (metal) B) scandium (metal) • C) germanium (Metalloid) D) ytterbium (metal) • E) manganese (metal) F) gold (metal) • G) tellurium (metalloid)

  29. #21 • A) K, alkali metals (metal) • B) I, halogens (nonmetal) • C) Mg, alkaline earth metals (metal) • D) Ar, noble gases (nonmetal) • E) S, chalcogens (nonmetals)

  30. #23 • An empirical formula shows the simplest ratio of the different atoms in a molecule. • A molecular formula shows the exact number and kinds of atoms in a molecule. • A structural formulas shows how these atoms are arranged.

  31. #26 • A) 4 • B) 6 • C) 9

  32. #28 • See board • A) Draw C2H5Br (1-bromo-ethane) • B) Draw C2H7N ( dimethylamine) • C) Draw CH2Cl2 ( dichloromethane) • D) Draw NH2Cl (chloroamine)

  33. #30 • A) SN • B) C7H15 • C) C3H5O • D) P2O3 • E) C3H5F4 • F)SiO3

  34. #32 • A) Ba2+ • B) La2+ or La3+ • C) Ga3+ • D) S2- • E) Br -

  35. #61

  36. Chapter 2.6 – 2.7 #38 • Molecular (all atoms are nonmetals) c) SCl2 • Ionic (formed by a cation and an anion, usually contains a metal cation)— a) Sc2O3 b) NaI d) Ca(NO3) 2 e) FeCl3 f) LaP g) CoCO3 h) (NH4) 2SO4

  37. #39 • A) ClO2- B) Cl- C) ClO3- • D) ClO4- E) ClO-

  38. #42 • A) silver sulfide • B) barium phosphate • C) magnesium chlorate • D) strontium sulfite • E) cobalt (II) bromide (cobaltous bromide) • F) tin (II) iodide (stannous iodide) • G) chromium (III) nitrate (chromic nitrate)

  39. #42 continued • H) zinc hydrogen phosphate (notice the lack of roman numerals—it has a definite charge of +2) • I) silver perchlorate (notice the lack of roman numerals—it has a definite charge of +1) • J) ammonium dichromate

  40. #44 • A) Mg3N2 • B) FeSO3 • C) Cr2(CO3)3 • D) CaH2 • E) Mg(HCO3)2 • F) KClO • G) Cu(C2H3O2)2

  41. #46 • A) HBr • B) H2SO3 • C) HNO2 • D) carbonic acid • E) chloric acid • F) acetic acid

  42. #48 • A) dinitrogen monoxide • B) nitrogen monoxide • C) nitrogen dioxide • D) dinitrogen pentoxide • E) dinitrogen tetroxide

  43. #58 • A) alkali metal – K • B) an alkaline earth metal – Ca • C) a noble gas – Ar • D) a halogen – Br • E) a metalliod – Ge • F) a nonmetal in 1A – H • G) a metal that forms a 3+ charge- Al • H) a nonmetal that forms a 2- charge – O • I) a metal that resembles Al - Ga

  44. #62 • A) Nickel (II) oxide, 2+ • B) Manganese (IV) oxide, 4+ • C) Chromium (III) oxide, 3+ • D) Molybdenium (VI) oxide, 6+

  45. #63 • Fe3S4 could be aq homo mixture where the Fe2+ and the Fe3+ ions are portions of the lattice structure

  46. #64 • A) IO3- • B) IO4- • C) IO- • D) HIO • E) HIO4 (or H5IO6)

  47. #67 • A) potassium nitrate • B) sodium carbonate • C) calcium oxide • D) hydrochloric acid • E) magnesium sulfate • F) magnesium hydroxide

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