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Chapter 3: Matter — Properties and Changes

Practice Test
  1.Properties that are dependent on the amount of substance present are ________.  
  a.   chemical properties  
  b.   external properties  
  c.   extensive properties  
  d.   intensive properties  
  2.What is the percent by mass of the components of water?  
  a.   89% H, 11% O b.   33% H, 67% O  
  c.   67% H, 33% O d.   11% H, 89% O  
  3.Which of the following is a heterogeneous mixture?  
  a.   samples of argon and iron in the same container  
  b.   sugar  
  c.   samples of nitrogen and oxygen in the same container  
  d.   sugar in water  
  4.When one substance changes identity, it exhibits a(n) __________.  
  a.   extensive property  
  b.   physical property  
  c.   intensive property  
  d.   chemical property  
  5.A characteristic that can be observed or measured without changing the sample’s composition is ________________.  
  a.   chemical property  
  b.   a physical property  
  c.   a crystalline property  
  d.   a gaseous property  
  6.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  
  7.How would you read the following chemical reaction?
2Cu + O2 → 2CuO
  a.   copper and oxygen yield copper(II) oxide  
  b.   copper yields oxygen and copper(II) oxide  
  c.   oxygen yields copper and copper(II) oxide  
  d.   copper(II) oxide yields oxygen and copper  
  8.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  
  9.A technique that uses a porous barrier to separate heterogeneous mixtures is _______.  
  a.   distillation  
  b.   filtration  
  c.   crystallization  
  d.   chromatography  
  10.What type of property is observed when milk sours?  
  a.   an intensive property  
  b.   a chemical property  
  c.   an extensive property  
  d.   a physical property  
  11.Elements on the left side of the periodic table are _______.  
  a.   compounds  
  b.   nonmetals  
  c.   metals  
  d.   metalloids  
  12.A technique that uses the differences in boiling point to separate homogeneous mixtures is _________.  
  a.   distillation  
  b.   filtration  
  c.   crystallization  
  d.   chromatography  
  13.Which of the following is a compound?  
  a.   steel  
  b.   water  
  c.   neon  
  d.   crude oil  
  14.Matter that has a uniform and unchanging composition is a ___________.  
  a.   solid  
  b.   mixture  
  c.   vapor  
  d.   substance  
  15.Fe2O3 is a(n) _____________.  
  a.   element  
  b.   compound  
  c.   homogeneous mixture  
  d.   heterogeneous mixture  
  16.Which of the following is a pure substance?  
  a.   soda  
  b.   gun powder  
  c.   steam  
  d.   sugar water  
  17.A vapor is a _________.  
  a.   gas  
  b.   solid  
  c.   liquid  
  d.   condensed state  
  18.In the following chemical reaction, how do you classify hydrogen and oxygen?
2H2 + O22H2O
  a.   chemical properties  
  b.   products  
  c.   reactants  
  d.   physical changes  
  19.Periods are ___________ on the periodic table.  
  a.   vertical columns  
  b.   horizontal rows  
  c.   left to right diagonals  
  d.   right to left diagonals  
  20.A solution of solids is a(n)___________.  
  a.   alloy  
  b.   filtration  
  c.   pure metal  
  d.   heterogeneous mixture  

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