Topic 7 Review - Formulas and Equations
1. Given the word equation:
sodium chlorate ® sodium chloride + oxygen
9. An unknown element X can form a compound with the
formula XBr 3. In which group on the Periodic Table
would element X be found?
A) 1
Which type of chemical reaction is represented by this
equation?
A) double replacement B) single replacement
C) decomposition
D) synthesis
2. In which type of chemical reaction do two or more
reactants combine to form one product, only?
A) synthesis
C) single replacement
B) decomposition
D) double replacement
B) 2
C) 13
D) 14
10. The reaction,
Ba(NO 3) 2(aq) + Na 2SO 4(aq)
2 NaNO3(aq) + BaSO 4(s),
forms a precipitate whose name is
A) nitrogen
C) barium nitrate
B) barium sulfate
D) soluble salt
3. Which balanced equation represents a
single-replacement reaction?
A)
B)
C)
D)
Mg + 2AgNO3
Mg(NO 3) 2 + 2Ag
2Mg + O2
2MgO
MgCO 3
MgO + CO2
MgCl 2 + 2AgNO3
2AgCl + Mg(NO3)2
4. What is the chemical formula of iron(III) sulfide?
A) FeS
C) FeSO 3
B) Fe2S3
D) Fe 2(SO3) 3
5. Which formula represents strontium phosphate?
A) SrPO4
C) Sr 2(PO4) 3
B) Sr 3PO 8
D) Sr 3(PO4) 2
6. The compound XCl is classified as ionic if X represents
the element
A) H
B) I
C) Rb
D) Br
7. In which compound is the ratio of metal ions to nonmetal
ions 1 to 2?
A) calcium bromide
C) calcium phosphide
B) calcium oxide
D) calcium sulfide
8. Given the unbalanced equation:
When the equation is balanced using the smallest whole-number coefficients, what is the coefficient of Al?
A) 1
B) 2
C) 3
D) 4
Answer Key
Topic 7 - Formulas and Equations SHORT
1.
C
2.
A
3.
A
4.
B
5.
D
6.
C
7.
A
8.
B
9.
C
10.
B