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Chapter 3: Matter — Properties and Changes

Practice Test
  1.How would you read the following chemical reaction?
2Cu + O2 → 2CuO
  a.   copper(II) oxide yields oxygen and copper  
  b.   oxygen yields copper and copper(II) oxide  
  c.   copper yields oxygen and copper(II) oxide  
  d.   copper and oxygen yield copper(II) oxide  
  2.Which of the following is a heterogeneous mixture?  
  a.   samples of argon and iron in the same container  
  b.   sugar in water  
  c.   samples of nitrogen and oxygen in the same container  
  d.   sugar  
  3.A technique that uses a porous barrier to separate heterogeneous mixtures is _______.  
  a.   chromatography  
  b.   filtration  
  c.   crystallization  
  d.   distillation  
  4.The statement, “Mass can neither be created nor destroyed” is the ____________.  
  a.   law of multiple proportions  
  b.   law of gravity  
  c.   law of conservation of energy  
  d.   law of conservation of mass  
  5.When one substance changes identity, it exhibits a(n) __________.  
  a.   intensive property  
  b.   chemical property  
  c.   extensive property  
  d.   physical property  
  6.Fe2O3 is a(n) _____________.  
  a.   heterogeneous mixture  
  b.   homogeneous mixture  
  c.   element  
  d.   compound  
  7.Seawater is not a substance because __________.  
  a.   it is a liquid  
  b.   its composition may be different from sample to sample  
  c.   it is salty  
  d.   it has hydrogen as part of its composition  
  8.Elements on the left side of the periodic table are _______.  
  a.   metals  
  b.   compounds  
  c.   nonmetals  
  d.   metalloids  
  9.Properties that are dependent on the amount of substance present are ________.  
  a.   chemical properties  
  b.   intensive properties  
  c.   extensive properties  
  d.   external properties  
  10.In the following chemical reaction, how do you classify hydrogen and oxygen?
2H2 + O22H2O
  a.   chemical properties  
  b.   products  
  c.   reactants  
  d.   physical changes  
  11.Which of the following is not a state of matter?  
  a.   liquid  
  b.   solid  
  c.   density  
  d.   gas  
  12.A form of matter that has a fixed shape and occupies a fixed volume is a _________.  
  a.   solid  
  b.   liquid  
  c.   gas  
  d.   plasma  
  13.A characteristic that can be observed or measured without changing the sample’s composition is ________________.  
  a.   a physical property  
  b.   a gaseous property  
  c.   a crystalline property  
  d.   chemical property  
  14.Which of the following is not a chemical property?  
  a.   freezing of water  
  b.   burning a piece of wood  
  c.   placing iron in hydrochloric acid and producing hydrogen gas  
  d.   rusting of iron  
  15.A material that cannot be broken down further by chemical means is a(n) ________.  
  a.   substance  
  b.   element  
  c.   mixture  
  d.   compound  
  16.A technique that uses the differences in boiling point to separate homogeneous mixtures is _________.  
  a.   filtration  
  b.   crystallization  
  c.   chromatography  
  d.   distillation  
  17.How can you tell when the following reaction is balanced?
2Cu + O2 → 2CuO
  a.   mass of the reactants = mass of products  
  b.   mass of reactants = volume of products  
  c.   volume of reactants = volume of products  
  d.   volume of reactants = mass of products  
  18.A vapor is a _________.  
  a.   condensed state  
  b.   solid  
  c.   gas  
  d.   liquid  
  19.What is the percent by mass of the components of water?  
  a.   33% H, 67% O b.   11% H, 89% O  
  c.   67% H, 33% O d.   89% H, 11% O  
  20.Periods are ___________ on the periodic table.  
  a.   vertical columns  
  b.   horizontal rows  
  c.   left to right diagonals  
  d.   right to left diagonals  

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