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25) 40.0 g/mol NaOH, 110.98 g/mol CaCl 2 98.14 g/mol KC 2 H 3 O 2 211.64 g/mol Sr(NO 3 ) 2

25) 40.0 g/mol NaOH, 110.98 g/mol CaCl 2 98.14 g/mol KC 2 H 3 O 2 211.64 g/mol Sr(NO 3 ) 2 149.10 g/mol (NH 4 ) 3 PO 4 26) 46.07 g/mol C 2 H 5 OH 342.30 g/mol C 12 H 22 O 11 27.03 g/mol HCN 153.81 g/mol CCl 4 , 18.02 g/mol H 2 O. 27) 319 g H 2 SO 4 28) 5.93 g ZnCl 2

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25) 40.0 g/mol NaOH, 110.98 g/mol CaCl 2 98.14 g/mol KC 2 H 3 O 2 211.64 g/mol Sr(NO 3 ) 2

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  1. 25) • 40.0 g/mol NaOH, • 110.98 g/mol CaCl2 • 98.14 g/mol KC2H3O2 • 211.64 g/mol Sr(NO3)2 • 149.10 g/mol (NH4)3PO4 • 26) • 46.07 g/mol C2H5OH • 342.30 g/mol C12H22O11 • 27.03 g/mol HCN • 153.81 g/mol CCl4, 18.02 g/mol H2O

  2. 27) 319 g H2SO4 • 28) 5.93 g ZnCl2 • 29) 403 g KMnO4 • 30) • A. 0.133 mol AgNO3 • B. 0.0403 mol ZnSO4 • C. 0.960 mol HCl • D. 0.157 mon Fe2O3 • E. 0.728 mol PbCl4

  3. 89) • A)1.51E23 atoms Ag • B) 5.15E21 formula units NaCl • C) 2.13E25 molecules CO2 • D) 2.56E23 molecules N2 • 90) • A) 5.39E-4 mol Pb • B) 8.24 mol of glucose • C) 2.59E-1 mol NaOH • D) 2.08E1 mol Cu2+ ions

  4. 91 • A) 2.51E-9 mol Si • B) 2.56E22 molecules H2SO4 • C) 1.49E2 mol CCl4 • D) 3.55E24 atoms Ca • 92) • A) 8.13E23 molecules CS2 • B) 1.53E23 molecules As2O3 • C) 7.53E23 molecules H2O • D) 9.030E25 molecules HCl

  5. 93. • A) 2.08E-9 mol CO2 • B) 5.96E-3 mol NaNO3 • C) 4.80E3 mol CaCO3 • 94) 9.03E22 atoms Au • 95) 2.29E23 Cu2+ and Ca2+ ions • 96) 3.2E-6 mol water • 97) 9.5E15 years; about 2 million times longer • 98)a. 20.9 g He b.0.130 molCo • C. 106 g Ti D. 0.411 grams Ge

  6. 99. • A) 24.3 g Li • B) 0.130 mol Co • C) 0.0671 mol Kr • D) 4.12 g As • 100. • A) 1.62E24 g Sb • B) 9.27E16 g Pt • C) 1.32E25 g Ag • D) 5.12E26 g Cr

  7. 101. • A. 1.67E-6 g U • B. 145 g H • C. 0.332 g O • D. 153 g Pb • 102) 5E13 atoms Ag • 103) a. 7.74E22 atoms Hg b.3.13E20 atoms Zn • C. 2.3E24 atoms Ar d. 3.07E21 atoms Mg • 104) C; atom C= 5.01E23; atom Ca= 1.50E23 • 105) atom C= atom Ca= 6.02E244 atoms

  8. Stoichiometry • 61-74 pages 379-80 • 61) 5.50 mol C2H2 • 62) 0.0119 mol CO2 • 63) 0.0125 mol CaCO3 • 64) 961 g citric acid • 65) 523 g C3H7COOC2H5 • 66) 2C8H18 + 25O2 16CO2 + 18H2O; • 71.4g C8H18

  9. 67) A. K2CrO4 + Pb(NO3)2  PbCrO4 + 2KNO3 • B. 80.8 g PbCrO4 • 68)A. N2H2 + H2O2  N2 + 2H2O • B) 3.00E2 g N2H2 • 69) 6.72 g CH4 • 70) C2H5OH + 3O2  2CO2 + H2O 191 g CO2 71) 1.88E13 g

  10. 72) • a.) Pb + PbO2 + 2H2SO42PbSO4 + 2H2O • B. 73.2 g PbSO4 • 73) • A) CO + 2H2  CH3OH • B) 5.67 g H2 • 74) • A) 50.2 g Au • B) 33.5% gold in ore.

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