Exam
Name___________________________________
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) When the following equation is balanced, the coefficients are __________.
NH3 (g) + O2 (g)
A) 2, 3, 2, 3
1)
NO2 (g) + H2 O (g)
B) 1, 1, 1, 1
C) 4, 7, 4, 6
D) 1, 3, 1, 2
E) 4, 3, 4, 3
2) When the following equation is balanced, the coefficients are __________.
Al(NO3 )3 + Na2 S
A) 2, 3, 2, 3
2)
Al2 S3 + NaNO3
B) 2, 3, 1, 6
C) 1, 1, 1, 1
D) 2, 1, 3, 2
E) 4, 6, 3, 2
3) When the following equation is balanced, the coefficient of H 2 is __________.
K (s) + H2 O (l)
A) 1
3)
KOH (aq) + H 2 (g)
B) 4
C) 3
D) 2
E) 5
4) When the following equation is balanced, the coefficient of Al is __________.
Al (s) + H2 O (l)
A) 2
4)
Al(OH)3 (s) + H2 (g)
B) 4
C) 1
D) 3
E) 5
5) When the following equation is balanced, the coefficient of H 2 O is __________.
Ca (s) + H2 O (l)
A) 1
5)
Ca(OH)2 (aq) + H2 (g)
B) 2
C) 3
D) 4
E) 5
6) When the following equation is balanced, the coefficient of Al2 O3 is __________.
Al2 O3 (s) + C (s) + Cl2 (g)
A) 3
B) 5
6)
AlCl3 (s) + CO (g)
C) 1
D) 4
1
E) 2
7) When the following equation is balanced, the coefficient of H 2 S is __________.
FeCl3 (aq) + H2 S (g)
A) 3
7)
Fe2 S3 (s) + HCl (aq)
B) 1
C) 4
D) 2
E) 5
8) When the following equation is balanced, the coefficient of HCl is __________.
CaCO3 (s) + HCl (aq)
A) 1
8)
CaCl2 (aq) + CO2 (g) + H2 O (l)
B) 0
C) 3
D) 2
E) 4
9) When the following equation is balanced, the coefficient of HNO3 is __________.
HNO3 (aq) + CaCO3 (s)
A) 2
9)
Ca(NO3 )2 (aq) + CO2 (g) + H2 O (l)
B) 3
C) 1
D) 4
E) 5
10) When the following equation is balanced, the coefficient of H3 PO4 is __________.
H3 PO4 (aq) + NaOH (aq)
A) 0
B) 2
10)
Na3 PO4 (aq) + H2 O (l)
C) 3
D) 1
E) 4
11) When the following equation is balanced, the coefficient of C3 H8 O3 is __________.
C3 H8 O3 (g) + O2 (g)
A) 7
B) 1
11)
CO2 (g) + H2 O (g)
C) 3
D) 2
E) 5
12) When the following equation is balanced, the coefficient of O2 is __________.
C2 H4 O (g) + O2 (g)
A) 1
B) 2
12)
CO2 (g) + H2 O (g)
C) 4
D) 3
E) 5
13) When the following equation is balanced, the coefficient of H 2 is __________.
CO (g) + H2 (g)
A) 2
B) 3
13)
H2 O (g) + CH4 (g)
C) 4
D) 0
2
E) 1
14) When the following equation is balanced, the coefficient of H 2 SO4 is __________.
H2 SO4 (aq) + NaOH (aq)
A) 1
B) 0.5
14)
Na2 SO4 (aq) + H2 O (l)
C) 2
D) 4
E) 3
15) When the following equation is balanced, the coefficient of water is __________.
K (s) + H2 O (l)
A) 3
B) 4
15)
KOH (aq) + H2 (g)
C) 5
D) 2
E) 1
16) When the following equation is balanced, the coefficient of hydrogen is __________.
K (s) + H2 O (l)
A) 2
B) 5
16)
KOH (aq) + H2 (g)
C) 4
D) 1
E) 3
17) When the following equation is balanced, the coefficient of oxygen is __________.
PbS (s) + O2 (g)
A) 4
B) 2
17)
PbO (s) + SO2 (g)
C) 3
D) 1
E) 5
18) When the following equation is balanced, the coefficient of sulfur dioxide is __________.
PbS (s) + O2 (g)
A) 2
B) 5
PbO (s) + SO2 (g)
C) 1
D) 3
E) 4
19) When the following equation is balanced, the coefficient of dinitrogen pentoxide is __________.
N2 O5 (g) + H2 O (l)
A) 3
B) 1
A) 2
B) 5
19)
HNO3 (aq)
C) 2
D) 5
E) 4
20) When the following equation is balanced, the coefficient of water is __________.
N2 O5 (g) + H2 O (l)
18)
20)
HNO3 (aq)
C) 4
D) 3
3
E) 1
21) When the following equation is balanced, the coefficient of nitric acid is __________.
N2 O5 (g) + H2 O (l)
A) 2
B) 4
21)
HNO3 (aq)
C) 5
D) 1
E) 3
22) Write the balanced equation for the reaction that occurs when methanol, CH3 OH (l), is burned in
air. What is the coefficient of methanol in the balanced equation?
A) 1
B) 2
C) 3
D) 4
4
E) 3/2
22)