Science Home Product Information Site Map Search Contact Us   Glencoe Online
Quizzes Quiz
 
Chapter 11: The Mole

Practice Test
      
  1.What is the percent composition of carbon dioxide CO(2)?  
  a.   33% C and 66% O  
  b.   27% C and 73% O  
  c.   73% C and 27% O  
  d.   50% C and 50% O  
  Hint    
      
  2.How many moles of C3H8 are present in 451 g C3H8?  
  a.   1.44 mol  
  b.   10.2 mol  
  c.   0.879 mol  
  d.   3.84 mol  
  Hint    
      
  3.A compound that has a specific number of water molecules bound to the structure is ______________?  
  a.   an anhydrate  
  b.   waterlogged  
  c.   aqueous  
  d.   a hydrate  
  Hint    
      
  4.What mass of iron is contained in 62.8 grams of pyrite FeS(2)?  
  a.   40.3 g  
  b.   31.7 g  
  c.   58.5 g  
  d.   29.2 g  
  Hint    
      
  5.How many moles of atoms are present in one mole of water?  
  a.   3 mol  
  b.   6 mol  
  c.   1 mol  
  d.   2 mol  
  Hint    
      
  6.What relationship is described by the formula below?
(mass of the element/mass of the compound) × 100
 
  a.   mole ratio  
  b.   percent composition  
  c.   Avogadro’s number  
  d.   empirical formula  
  Hint    
      
  7.An empirical formula mass is found to be 17 g/mol. The molar mass is found to be 34 g/mol. What is the number of empirical formula units in this molar mass?  
  a.   1 unit  
  b.   17 units  
  c.   0.5 unit  
  d.   2 units  
  Hint    
      
  8.A 4.628-g sample of an iron oxide was found to contain 3.348 g of iron and 1.280 g of oxygen. What is the simplest formula for this compound?  
  a.   FeO  
  b.   Fe3O4  
  c.   Fe2O3  
  d.   FeO2  
  Hint    
      
  9.How many particles are present in one mole of particles?  
  a.   3.0 × 108  
  b.   12  
  c.   1  
  d.   6.02 × 1023  
  Hint    
      
  10.How many moles of hydrogen atoms are present in 2.0 moles of ammonia NH(3)?  
  a.   3.0 mol  
  b.   2.0 mol  
  c.   6.0 mol  
  d.   8.0 mol  
  Hint    
      
  11.How many moles of hydrogen are present in 2.0 grams of hydrogen gas?
 
  a.   4.0 mol  
  b.   0.5 mol  
  c.   2.0 mol  
  d.   1.0 mol  
  Hint    
      
  12.What is the SI base unit used to measure the amount of a substance?  
  a.   mole  
  b.   kilogram  
  c.   meter  
  d.   kelvin  
  Hint    
      
  13.How is one gram defined?  
  a.   0.1 mole of amu  
  b.   10 moles of amu  
  c.   one mole of amu  
  d.   one mole of protons  
  Hint    
      
  14.What is the mass of one mole of carbon-12 atoms?  
  a.   12 grams  
  b.   6 amu  
  c.   12 amu  
  d.   6 grams  
  Hint    
      
  15.What is the molar mass of H2CrO4?  
  a.   2 g  
  b.   118 g  
  c.   64 g  
  d.   52 g  
  Hint    
      
  16.Which word indicates that two water molecules are associated with a substance in a chemical compound?  
  a.   tri-  
  b.   di-  
  c.   mono-  
  Hint    
      
  17.How can the actual molecular formula be determined?  
  a.   from the molar mass alone  
  b.   from the molar mass divided by the mass of the empirical formula  
  c.   from the molar mass multiplied by the mass of the empirical formula  
  d.   from the empirical formula alone  
  Hint    
      
  18.What mass of calcium metal could be obtained from 1 kg of limestone that is 50.0% pure CaCO3?  
  a.   0.05 kg  
  b.   0.5 kg  
  c.   0.4 kg  
  d.   0.2 kg  
  Hint    
      
  19.How many molecules of ammonia are present in 34.0 g of ammonia NH(3)?  
  a.   34  
  b.   6.02 × 1023  
  c.   1.77 × 1022  
  d.   1.20 × 1024  
  Hint    
      
  20.Analysis of a covalent compound showed that it contained 14.4% hydrogen and 85.6% carbon by mass. What is the empirical formula for this compound?  
  a.   CH2  
  b.   C2 H3  
  c.   CH  
  d.   CH2  
  Hint    

 
   
McGraw-Hill / Glencoe
The McGraw-Hill Companies