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Quiz on PS.5c Balancing Chemical Equationsry
  • 1. Balance the following equation on your own sheet of paper. ___AcF3 + ___Li --> ___Ac + ___LiF. AFTER you have completely balanced the equation, read the following choices, and choose the one that is TRUE.
A) The coefficient in front of the Li on the reactants side is 2.
B) The coefficient in front of the AcF3 on the reactants side is 3.
C) The coefficient in front of the Li on the reactants side is 3.
D) The coefficient in front of the LiF on the reactants side is 3.
  • 2. Balance the following equation on your own sheet of paper. ___WO3 + ___C --> ___W + ___CO2. AFTER you have completely balanced the equation, read the following choices, and choose the one that is TRUE.
A) The coefficient in front of the C on the reactants side is 2.
B) There are four total coefficients in the balanced equation.
C) The coefficient in front of the CO2 on the products side is 2.
D) The coefficient in front of the W on the products side is 3.
E) The coefficient in front of the WO3 on the reactants side is 3.
  • 3. Balance the following equation on your own sheet of paper. ___Fe3O4 + ___H2 --> ___Fe + ___H2O.. AFTER you have completely balanced the equation, read the following choices, and choose the one that is TRUE.
A) The coefficient in front of the Fe3O4 is 2.
B) The coefficient in front of the water on the products side is 4.
C) The coefficient in front of the Fe on the products side is 2.
D) The coefficient in front of the H2 on the reactants side is 2.
  • 4. Reactants are on the --
A) right
B) middle
C) left
  • 5. Products are on the --
A) middle
B) right
C) left
  • 6. The yields arrow is --
A) on the left
B) on the right
C) in the middle
  • 7. Balance the following equation on your own sheet of paper. ___SnO2 + ___H2 --> ___Sn + ___H2O. AFTER you have completely balanced the equation, read the following choices, and choose the one that is TRUE.
A) The coefficient in front of SnO2 on the reactants side is 2.
B) The coefficient in front of H2O on the products side is 1.
C) The coefficient in front of H2 on the reactants side is 1.
D) The coefficient in front of H2 on the reactants side is 2.
  • 8. Balance the following equation on your own sheet of paper. ___Mg + ___O2 --> ___MgO. AFTER you have completely balanced the equation, read the following choices, and choose the one that is TRUE.
A) The coefficient in front of the O2 on the reactants side is 2.
B) The coefficient in front of the O2 on the reactants side is 3.
C) The coefficient in front of the Mg on the reactants side is 2.
D) The coefficient in front of the MgO on the products side is 1.
  • 9. Balance the following equation on your own sheet of paper. ___Li + ___O2 --> ___Li2O. AFTER you have completely balanced the equation, read the following choices, and choose the one that is TRUE.
A) The coefficient in front of the O2 on the reactants side is 2.
B) The coefficient in front of the O2 on the reactants side is 3.
C) The coefficient in front of the Li2O on the products side is 1.
D) The coefficient in front of the Li on the reactants side is 4.
  • 10. Balance the following equation on your own sheet of paper. ___ScF3 + ___K --> ___Sc + ___KF. AFTER you have completely balanced the equation, read the following choices, and choose the one that is TRUE.
A) When the equation is balanced, the number of Scandium atoms (Sc) is 2 on both the reactants and products sides.
B) When the equation is balanced, the number of Potassium atoms (K) is 1 on both the reactants and products sides.
C) When the equation is balanced, the number of Potassium atoms (K) is 3 on both the reactants and products sides.
D) When the equation is balanced, the number of Fluorine atoms (F) is 1 on both the reactants and products sides.
  • 11. The squiggly line goes straight out of the --
A) left plus sign
B) arrow
C) right plus sign
  • 12. When balancing an equation, you are only allowed to change the --
A) subscripts
B) coefficients
C) superscripts
  • 13. Consider this: 2H3O2. How many oxygen atoms are there?
A) 4
B) 6
C) 2
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