 Balancing Equations
2 years ago
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Practice 15 QuestionsShow answers
• Question 1
30 seconds
Q. What is a coefficient?
The small number on the right of the chemical symbol.
The large number to the left of a formula.
• Question 2
30 seconds
Q. Which side of a chemical equation is the product side?
Left (before the arrow)
Right (after the arrow)
• Question 3
30 seconds
Q. Which side of a chemical equation is the reactant side?
Left (before the arrow)
Right (after the arrow)
• Question 4
60 seconds
Q. Which problem is balanced?
PbO2 + 2H2
SO2 + H20 --> H2SO4
2Na + 2H2O --> 2NaOH + H2
• Question 5
60 seconds
Q. Is the equation balanced?: 2H2O + O2 --> 4MgO + 3Fe
Yes
No
• Question 6
30 seconds
Q. What is the little number after an element in a chemical equation called.
Example: H2
Coefficient
Subscript
Atom
Equation
• Question 7
30 seconds
Q. What is the arrow in a chemical equation...
H2 + O --> H2O
Reactants
Products
Produces
Chemical Equation
• Question 8
180 seconds
Q. Balance this equation
_Zn+_HCl-->_ZnCl+_H2
1,1,2,1
1,1,1,2
1,2,1,1
2,1,1,1
• Question 9
180 seconds
Q. Balance this equation.
_Mg + _Cl--> _MgCl2
1, 2,1
2,1,1
1,1,2
• Question 10
30 seconds
Q. What does the Law of Conservation of Mass state?
Matter cannot be gained or lost in a chemical reaction.
Matter can only be lost in a chemical reaction.
Matter can only be gained in a chemical reaction.
Matter can be gained and lost in a chemical reaction.
• Question 11
30 seconds
Q. Is this balanced?...
Fe + S --> FeS
YES!
NO!
• Question 12
30 seconds
Q. KNO3 --> KNO2 + O2
What coefficients are needed to balance the reaction?
2, 2, 1
2, 3, 2
1, 2, 2
1, 3, 1
• Question 13
180 seconds
Q. Balance this equation-
__P+ __O--> __P2O3
2, 1, 3
1, 2, 3
1, 3, 2
• Question 14
180 seconds
Q. Balance this equation.
_Mg + _Cl--> _MgCl2
1, 2,1
2,1,1
1,1,2
• Question 15
180 seconds
Q. Balance this equation.
_CH4 + _O--> _CO+ _H2O