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Chapter 3: Matter — Properties and Changes

Practice Test
  1.How can you tell when the following reaction is balanced?
2Cu + O2 → 2CuO
  a.   volume of reactants = mass of products  
  b.   volume of reactants = volume of products  
  c.   mass of the reactants = mass of products  
  d.   mass of reactants = volume of products  
  2.Matter that has a uniform and unchanging composition is a ___________.  
  a.   vapor  
  b.   mixture  
  c.   solid  
  d.   substance  
  3.Elements on the left side of the periodic table are _______.  
  a.   metalloids  
  b.   nonmetals  
  c.   compounds  
  d.   metals  
  4.In the following chemical reaction, how do you classify hydrogen and oxygen?
2H2 + O22H2O
  a.   physical changes  
  b.   chemical properties  
  c.   reactants  
  d.   products  
  5.A vapor is a _________.  
  a.   condensed state  
  b.   solid  
  c.   liquid  
  d.   gas  
  6.Periods are ___________ on the periodic table.  
  a.   left to right diagonals  
  b.   right to left diagonals  
  c.   horizontal rows  
  d.   vertical columns  
  7.Properties that are dependent on the amount of substance present are ________.  
  a.   chemical properties  
  b.   external properties  
  c.   extensive properties  
  d.   intensive properties  
  8.Which of the following is not a state of matter?  
  a.   solid  
  b.   gas  
  c.   liquid  
  d.   density  
  9.What is the percent by mass of the components of water?  
  a.   11% H, 89% O b.   33% H, 67% O  
  c.   89% H, 11% O d.   67% H, 33% O  
  10.Which of the following is not a chemical property?  
  a.   rusting of iron  
  b.   placing iron in hydrochloric acid and producing hydrogen gas  
  c.   freezing of water  
  d.   burning a piece of wood  
  11.A form of matter that has a fixed shape and occupies a fixed volume is a _________.  
  a.   solid  
  b.   gas  
  c.   liquid  
  d.   plasma  
  12.What type of property is observed when milk sours?  
  a.   a chemical property  
  b.   an extensive property  
  c.   a physical property  
  d.   an intensive property  
  13.Which of the following is a heterogeneous mixture?  
  a.   sugar in water  
  b.   samples of nitrogen and oxygen in the same container  
  c.   samples of argon and iron in the same container  
  d.   sugar  
  14.A technique that uses a porous barrier to separate heterogeneous mixtures is _______.  
  a.   chromatography  
  b.   distillation  
  c.   crystallization  
  d.   filtration  
  15.The statement, “Mass can neither be created nor destroyed” is the ____________.  
  a.   law of conservation of mass  
  b.   law of multiple proportions  
  c.   law of gravity  
  d.   law of conservation of energy  
  16.Seawater is not a substance because __________.  
  a.   it is salty  
  b.   it is a liquid  
  c.   its composition may be different from sample to sample  
  d.   it has hydrogen as part of its composition  
  17.Which of the following is a compound?  
  a.   water  
  b.   neon  
  c.   crude oil  
  d.   steel  
  18.A solution of solids is a(n)___________.  
  a.   alloy  
  b.   heterogeneous mixture  
  c.   pure metal  
  d.   filtration  
  19.Which of the following is a pure substance?  
  a.   steam  
  b.   gun powder  
  c.   sugar water  
  d.   soda  
  20.When one substance changes identity, it exhibits a(n) __________.  
  a.   chemical property  
  b.   extensive property  
  c.   intensive property  
  d.   physical property  

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