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Chapter 3: Matter — Properties and Changes

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

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