Quiz Name: Chemical Equations
Type: Question and Answer
Instructions: Write your answers on a separate sheet of paper. Then check your answers by clicking on “Answer Key” at the bottom of this page.
Question 1: What are the small numbers that go after elements and groups called?
Question 2: What are the large numbers that go in front of individual elements or compounds called?
Question 3: What type of reaction takes place when two elements combine to form one new compound?
Question 4: When you have an element in a reaction that is diatomic and not in a compound what subscript does it automatically get?
Question 5: Can coefficients be placed in the middle of compounds? (yes or no)
Question 6: If calcium and oxygen combine what would be the correct balanced formula for the compound formed?
Question 7: In this formula Ca + O ----> CaO does the oxygen or calcium need a diatomic two?
Question 8: After placing in the subscripts (Ca + O2 ---> CaO) is this equation balanced? (yes or no)
Question 9: In (Ca + O2 ---> CaO) where would you have to place a coefficient two to balance the O? In front of the Ca, O or CaO?
Question 10: Where would you have to place another coefficient two to balance (Ca + O2 ---> 2CaO) ? In front of the Ca, O or CaO?
Question 11: What is the name for CaO?
Question 12: What is the name for O?
Question 13: What is the name for Ca?
Question 14: Now that this reaction is balanced 2Ca + O2 ----> 2CaO what would be the product(s)? Calcium and Oxygen or Calcium Oxide?
Question 15: If calcium oxide is the product in 2Ca + O2 ----> 2CaO what is the calcium and oxygen?
Question 16: The law of ____________ of matter says that matter cannot be created or destroyed in an ordinary chemical reaction.
Question 17: What type of reaction occurs when one compound is broken into two elements?
Question 18: What type of reaction is CaCl2 + F2 ----> CaF2 + Cl2?
Question 19: What type of reaction is CuCl + KBr ---> CuBr + KCl
Question 20: What do the names of compounds that contain two elements end in?
Question 21: What element is produced when iron iodide combines with chlorine?
Question 22: What element is produced when calcium chloride combines with magnesium?
Question 23: What compound is produced when calcium iodide combines with potassium?
Question 24: What is the formula mass for lead sulfate?
Question 25: What is the formula mass aluminum acetate?
Question 26: What is the formula mass for ammonium phosphate?
Question 27: What compound is formed when lead combines with oxygen?
Question 28: In what type of reaction are diatomics not checked?
Question 29: What are all compounds checked for?
Question 30: When there is 3 of an element on one side and 2 on the other side how many do you get on both sides? (spell out answer)
Question 31: (yes or no) Can subscripts be changed to balance one side of an equation with the other?
Question 32: (yes or no) Are diatomic checked in compounds?
Question 33: What type of reaction takes place when two elements combine to form a compound?
Question 34: What type of reaction takes place when an element takes the place of an element in a compound?
Question 35: In a double replacement reaction what type of materials are combining?
Question 36: (yes or no) Single replacement reactions produce two elements.
Question 37: When the reactant is one compound what type of reaction must be occurring?
Question 38: Which of the following are not diatomic chlorine, fluorine, oxygen, potassium, bromine, hydrogen , and sulfur.
Question 39: (yes or no) Do you check diatomics in compounds?