Loss, Decrease What is the oxidation Loss, Increase number of manganese in How many of the RbMnO4? following are strong +8 +7 Be(OH)2, NO2-, NaOH, +6 HClO, Ba(OH)2, OH- +5 One +4 Two 0 -4 Four -5 Five -6 Six -7 IF + CH4 HF + CH3I -8 + Sr(NO3)2 In the above reaction, Be(NO3)2 + SrSO4 carbon was ______ because its oxidation In the above reaction, number _______. is a precipitate Reduced, formed? Increased Yes Reduced, No Decreased It’s impossible Oxidized, to tell. Increased Oxidized, Decreased An unknown compound If 5.000 mol Ba2TiO4 consists of 36% (MW = 386.5 g/mol) is carbon, 54% beryllium, combined in sulfuric and 9% hydrogen by acid, how many grams mass. What is the of barium sulfate (MW empirical formula for = 233.4 g/mol) is this unknown compound? produced? CBeH ___Ba2TiO4 + ___H2SO4 C2Be4H2 ___H4TiO4 + ___BaSO4 C3Be2H 1167 g BaSO4 C2Be3H 1933 g BaSO4 CBe2H3 3865 g BaSO4 C3BeH2 2334 g BaSO4 6.039 g BaSO4
Loss, Decrease Loss, Increase How many of the following are strong Be(OH)2, NO2-, NaOH, HClO, Ba(OH)2, OH- One Two Four Five Six IF + CH4 HF + CH3I In the above reaction, carbon was ______ because its oxidation number _______. Reduced, Increased Reduced, Decreased Oxidized, Increased Oxidized, Decreased An unknown compound consists of 36% carbon, 54% beryllium, and 9% hydrogen by mass. What is the empirical formula for this unknown compound? CBeH C2Be4H2 C3Be2H C2Be3H CBe2H3 C3BeH2 What is the oxidation number of manganese in RbMnO4? +8 +7 +6 +5 +4 0 -4 -5 -6 -7 -8 + Sr(NO3)2 Be(NO3)2 + SrSO4 In the above reaction, is a precipitate formed? Yes No It’s impossible to tell. If 5.000 mol Ba2TiO4 (MW = 386.5 g/mol) is combined in sulfuric acid, how many grams of barium sulfate (MW = 233.4 g/mol) is produced? ___Ba2TiO4 + ___H2SO4 ___H4TiO4 + ___BaSO4 1167 g BaSO4 1933 g BaSO4 3865 g BaSO4 2334 g BaSO4 6.039 g BaSO4
chem_111_mock_final_exam_fall_2017.docx