Chemistry Exam: Atomic Weights and Compound Formulas, Exams of Chemistry

Download Chemistry Exam: Atomic Weights and Compound Formulas and more Exams Chemistry in PDF only on Docsity! V, 25 September 2000 S.O. Grim Atomic weights H...1.008 C...12.01 N...14.01 O.. 16.00 Na..22.99 S......32.07 As....74.92 Sb...121.76 Au...196.97 Hg...200.59 Chemistry 103 Hour Exam IB Velocity of light c = 2.998 x 108m/s c •u = — X Molar masses As2O 3 ... 197.84 As 2 O5 ...229.84 Sb2 O3 ...291.52 Sb2O5 ...323.52 Name (Print) Signature__ Section Number_ Seat Number SCORE 1(20) _ 11(30) 111(22) _ V(10) _ TOTAL(IOO) PERIODIC TABLE I 6 > 2 ] 3 I 8 ( i: ] (2 3 si 94 1 Ja 3.0 9 K 9.1 57 lb 5.5 55 :s 12.9 37 Fr 23) 4 Be 9.01 12 Mg 24.3 20 Ca 40.1 38 Sr 87.6 56 Ba 137.3 88 Ra (226) 21 Sc 45.0 39 Y 88.9 57 La 138.9 89 Ac (227) 22 Ti 47.9 40 Zr 91.2 72 Hf 178.5 104 Rf (259) 23 V 50.9 41 Nb 92.9 73 Ta 180.9 105 Db 24 Cr 52.0 42 Mo 95.9 74 w 183.9 106 Sg 25 Mn 54.9 43 Tc (97) 75 Re 186.2 107 Bh 26 Fe 55.8 44 Ru 101.1 76 Os 190.2 108 Hs I H 1.008 27 Co 58.9 45 Rh 102.9 77 Ir 192.2 109 Mt 28 Ni 58.7 46 Pd 106.4 78 Pt 195.1 29 Cu 63.5 47 Ag 107.9 79 Au 197.0 30 Zn 65.4 48 Cd 112.4 80 Hg 200.6 5 B 10.8 13 Al 27.0 31 Ga 69.7 49 In 114.8 81 Tl 204.4 6 C 12.01 14 Si 28.1 32 Ge 72.6 50 Sn 118.7 82 Pb 207.2 7 N 14.01 15 P 31.0 33 As 74.9 51 Sb 121.8 83 Bi 209.0 8 O 16.00 16 S u32 ' 1 34 Se 79.0 52 Te 127.6 84 Po 209 1 ( 3 I 7 12 t (1 9 F 3.0 7 :i 5.5 55 Ir 9.9 53 I 6.9 35 Vt 10) 2 He 4.00 10 Ne 20.2 18 Ar 39.9 36 Kr 83.8 54 Xe 131.3 86 Rn (222) 58 Ce 140.1 59 Pr 140.9 60 Nd 144.2 61 Pm (147) 62 Sm 150.4 63 Eu 152.0 64 Gd 157.3. 65 Tb 158.9 66 Dy 162.5 67 Ho 164.9 68 Er 167.3 69 Tm 168.9 70 Yb 173.0 71 Lu 175.0 90 Th 232.0 91 Pa (231) 92 U 238.0 93 Np (237) 94 Pu (244) 95 Am (243) 96 Cm (248) 97 Bk (247) 98 Cf (251) 99 Es (254) 100 Fm (257) 101 Md (258) 102 No (255) 103 Lr (257) I. Nomenclature. (2 points each) 1. Give the name for: (a) CrBr3 ____ (b) KHS04 ____ (c) Ba3(P04)2 ____ 2. Give the formula for: (d) iron(III) oxide ___________ (e) magnesium nitrate ___________ (f) calcium nitride ___________ (g) the monatomic ion with 34 protons and 36 electrons (h) the monatomic ion with 21 protons and 18 electrons (i) an alpha ray __________ 3. Give the number of neutrons in "Tc _______ II. (5 points each) Given: 125 g of tetrahydrofuran, C^gO (THF). 4. Find: (a) The molar mass of THF. (b) The percentage of carbon in THF. (c) The number of moles in the sample of 125 g of THF. (d) The total number of atoms in the sample. (e) The mass of carbon in the sample.