Webcytology
  Home  Search  Feedback  Links  Awards  Credits
Simulation
     Create an Account
    Login
    Cell Database
    Simulation Worlds
    The Leaderboard
 Reference
     The Guide
    Glossary
    Quizzes
 Teachers' Forum
     Essays
    Review Sheets
    Labs

Know what you're looking for? Try a Quick Search.

ThinkQuest
Webcytology was created for ThinkQuest 1999.
Quizzes

Molecular and structural formulas

[go to this section in the Guide]
Chapter Two: The Chemistry of Biology


Question 1
 Molecular and structural formulas are best described as ways for a scientists to
   1.  calculate the number of molecules there are in a container
2.  determine whether or not a molecule is produced after a chemical reaction
3.  prove that a molecule can be found in the atmosphere
4.  indicate what atoms a molecule contains
 

Question 2
 If a molecule has a molecular formula of H2CO3, then how many oxygen atoms does it have (the symbol for oxygen is O)?
   1.  1
2.  2
3.  3
4.  it cannot be determined
 

Question 3
 If the molecular formula of a molecule is C3H4O3, which of the following is the correct way of indicating that you have 6 of these molecules?
   1.  6C3H4O3
2.  C18H24O18
3.  6C18H24O18
4.  C9H10O9
 

Question 4
 Structural formulas are different from molecular formulas in that structural formulas
   1.  show the number of each type of atom in a molecule
2.  are usually more compact than molecular formulas
3.  do not use the symbols for the elements in the molecule
4.  indicate how the atoms in the molecule are arranged
 

Question 5
 When two molecules have exactly the same number of each type of atom, they only way of telling them apart is by looking at their
   1.  molecular formulas
2.  structural formulas
3.  you cannot tell them apart
4.  two molecules with the same number of each type of atom must be the same type of molecule
 


 
 

ThinkQuest Team #27819 - 27819@for.net
Team: Andrew Kallem, Josh Tauberer
Coaches: Ms. Acerra, Mr. Kwitkin