Download Equations Practice Exam Date

Name ________________
1.
Equations Practice Exam
Date:_________________
Ba(NO3)2(aq) + Na2SO4(aq) ® 2 NaNO3(aq) + BaSO4(s)
What type of reaction is shown above?
1) synthesis
2) decomposition
3) single replacement
4) double replacement
2. Given the balanced equation representing a
reaction:
Which type of reaction is represented by this equation?
1) decomposition
2) double replacement
3) single replacement
4) synthesis
3. Given the balanced equation representing a reaction:
4Al(s) + 3O 2(g)
2Al 2O3(s)
Which type of chemical reaction is represented by this equation?
1) double replacement
2) single replacement
3) substitution
4) synthesis
4. Which equation represents a decomposition reaction?
1) CaCO3(s) ® CaO(s) + CO 2(g)
2) Cu(s) + 2AgNO 3(aq) ®
2Ag(s) + Cu(NO3) 2(aq)
3) 2H2(g) + O 2(g) ® 2H2O(l)
4) KOH(aq) + HCl(aq) ® KCl(aq) + H 2O(l)
5. If an equation is balanced properly, both sides of the equation must have the same number of
1) atoms
2) coefficients
6.
3) molecules
4) moles of molecules
2 SO2(g) + O2(g) « 2 SO3(g)
What type of reaction is shown above?
1) synthesis
2) decomposition
3) single replacement
4) double replacement
7. Which balanced equation represents a single-replacement reaction?
1) Mg + 2AgNO3
Mg(NO 3) 2 + 2Ag
2) 2Mg + O2
2MgO
3) MgCO 3
MgO + CO2
4) MgCl 2 + 2AgNO3
2AgCl + Mg(NO3)2
8. Given the balanced equation:
2KClO 3
2KCl + 3O 2
Which type of reaction is represented by this equation?
1) synthesis
2) decomposition
3) single replacement
4) double replacement
Chemistry!
Equations Practice Exam
9. Given the balanced equation:
AgNO3(aq) + NaCl(aq)
NaNO3 (aq) + AgCl(s)
This reaction is classified as
1) synthesis
2) decomposition
3) single replacement
4) double replacement
10. A balanced equation representing a chemical reaction can be written using
1) chemical formulas and mass numbers
2) chemical formulas and coefficients
3) first ionization energies and mass numbers
4) first ionization energies and coefficients
11. Which equation shows a conservation of mass?
1) Na + Cl2 ® NaCl
2) Al + Br 2 ® AlBr 3
3) H2O ® H2 + O2
4) PCl5 ® PCl3 + Cl 2
12. Given the unbalanced equation:
__ Al(s) + __O2(g) ® __Al2O3(s)
When this equation is correctly balanced using smallest whole numbers, what is the coefficient of O2(g)?
1) 6
2) 2
3) 3
4) 4
13. When the equation
__ C2H4 + __ O2 ® __ CO2 + __ H2O
is balanced using smallest whole numbers, what is the coefficient of the O2?
1) 1
2) 2
3) 3
4) 4
14. When the equation
__SiO2 + __C ® __SiC + __CO
is correctly balanced using whole-number coefficients, the sum of all the coefficients is
1) 6
2) 7
3) 8
4) 9
15. When the equation
__H2 + __N2 ® __NH3
is completely balanced using smallest whole numbers, the sum of all the coefficients will be
1) 6
2) 7
3) 3
4) 12
16. When the equation
__NH3 + __O2 ® __N2 + __H2O
is completely balanced using the smallest whole numbers, the coefficient of the O2 will be
1) 1
2) 2
3) 3
4) 4
Chemistry!
Equations Practice Exam
17. Which equation shows conservation of atoms?
1) H2 + O 2
2) H2 + O 2
H2O
2H2O
3) 2H 2 + O2
4) 2H2 + 2O2
2H 2O
2H2O
18. Given the incomplete equation:
4Fe + 3O2
2X
Which compound is represented by X?
1) FeO
2) Fe2O 3
3) Fe 3O2
4) Fe 3O4
19. Given the balanced equation representing a reaction:
F2(g) + H 2(g) 2HF(g)
What is the mole ratio of H 2(g) to HF(g) in this reaction?
1) 1:1
2) 1:2
3) 2:1
4) 2:3
20. Given the equation:
2 C2H2(g) + 5 O 2(g)
4 CO 2(g) + 2 H 2O(g)
How many moles of oxygen are required to react completely with 1.0 mole of C 2H2?
1) 2.5
2) 2.0
3) 5.0
4) 10
21. Given the reaction:
C6H12O6(s) + 6 O2(g) ® 6 CO2(g) + 6 H2( )
How many moles of C6H12O6(s) are needed to produce 24 moles of carbon dioxide?
1) 1.0 moles
2) 12 moles
3) 24 moles
4) 4.0 moles
22. Given the balanced equation:
2 C4H10(g) + 13 O 2(g) 8 CO 2(g) + 10 H 2O(g)
What is the total number of moles of O 2(g) that must react completely with 5.00 moles of C 4H10(g)?
1) 10.0
2) 20.0
3) 26.5
4) 32.5
23. Given a balanced chemical equation it is always possible to determine
1)
2)
3)
4)
whether a reaction will or will not take place
the conditions necessary for the reaction to take place
the relative number of moles taking part in the reaction
the physical state of the products and reactants
24. Given the reaction:
6 CO 2 + 6 H2O C6H12O6 + 6 O2
What is the total number of moles of water needed to make 2.5 moles of C 6H12O6 ?
1) 2.5
2) 6.0
3) 12
4) 15
Chemistry!
Answer Key
Packet 14 Quiz
1.
4
2.
3
3.
4
4.
1
5.
1
6.
1
7.
1
8.
2
9.
4
10.
2
11.
4
12.
3
13.
3
14.
2
15.
1
16.
3
17.
3
18.
2
19.
2
20.
1
21.
4
22.
4
23.
3
24.
4
Chemistry!