Balancing Level 3
1. What are the missing coefficients for the skeleton equation below?
a. Cr(s) + Fe(NO3)2(aq)  Fe(s) + Cr(NO3)3(aq)
B) 4,6,6,2
C) 2,3,2,3
D) 2,3,3,2
E) 1,3,3,1
F) 2,3,1,2
2. What are the missing coefficients for the skeleton equation below?
3. NH3 (g) + O2(g)  N2(g) + H2O(l)
A) 4,3,2,6
B) 2,1,2,3
C) 1,3,1,3
D) 2,3,2,3
E) 3,4,6,2
3. If you rewrite the following word equation as a balanced chemical equation, what
will the coefficient and symbol for iodine be?
4. bromine + potassium iodide  potassium bromide + iodine
A) 2IB) I
C) 2I
D) I2
E) 2I2
4. If you rewrite the following word equation as a balanced chemical equation, what
will the coefficient and symbol for fluorine be?
5. nitrogen trifluoride  nitrogen + fluorine
A) 3F
B) 6F2
C) F3
D) 6F
E) 3F2
5. What are the missing coefficients for the skeleton equation below?
6. AlCl3 + NaOH  Al(OH)3 + NaCl
A) 1,3,1,3
B) 3,1,3,1
C) 1,1,1,3
D) 1,3,3,1
E) 3,1,1,1
6. What are the missing coefficients for the skeleton equation below?
7. N2 + H2  NH3
A) 1,1,2
B) 1,3,3
C) 3,1,2
D) 1,3,2
E) 2,6,6
Balancing Level 3
7. Aluminum chloride and bubbles of hydrogen gas are produced when metallic
aluminum is placed in hydrochloric acid. What is the balanced equation for this
reaction?
F)
G)
H)
I)
H + AlCl  Al + HCl
2Al + 6HCl  2AlCl3 + 3H2
Al + HCl3  AlCl3 + H
Al + 2HCl  AlCl2 + H2