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Balanced Equations, Hidden Subscripts
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Li
₂
O + H
₂
O →
2
LiOH
2
Na
₂
HPO
₄
→
Na
₄
P
₂
O
₇
+ H
₂
O
H
₄
As
₂
O
₇
→
As
₂
O
₅
+
2
H
₂
O
2
Na
₂
HPO
₄
→ Na
₄
P
₂
O
₇
+ H
₂
O
H
₄
As
₂
O
₇
→ As
₂
O
₅
+
2
H
₂
O
CaC
₂
+ N
₂
→ CaCN
₂
+
2
C
2
Mg(OH)
₂
→ (MgOH)
₂
O + H
₂
O
2
HAsO
₃
→ As
₂
O
₅
+ H
₂
O
2
KHSO
₄
→ K
₂
S
₂
O
₇
+ H
₂
O
2
H
₃
PO
₄
→ H
₄
P
₂
O
₇
+ H
₂
O
2
HAsO
₂
→ As
₂
O
₃
+ H
₂
O
2
HIO
₃
→ I
₂
O
₅
+ H
₂
O
Hg
₂
CO
₃
→
2
Hg + HgO + CO
₂
CaSO
₄
→ CaS +
2
O
₂
3
Mg + N
₂
→ Mg
₃
N
₂
K
₂
O + H
₂
O →
2
KOH
Ca(OH)
₂
+
2
CO
₂
→ Ca(HCO
₃
)
₂
N
₂
O
₃
+ H
₂
O →
2
HNO
₂
Fe
₂
O
₃
+
2
SiO
₂
→ Fe
₂
Si
₂
O
₇
Na
₂
O + H
₂
O →
2
NaOH
NH
₄
NO
₃
→ N
₂
O +
2
H
₂
O
N
₂
O
₅
+ H
₂
O →
2
HNO
₃
CaS +
2
H
₂
O → Ca(OH)
₂
+ H
₂
S
Al(OH)
₃
+ NaOH → NaAlO
₂
+
2
H
₂
O
(CuOH)
₂
CO
₃
→
2
CuO + CO
₂
+ H
₂
O
SrBr
₂
+ (NH
₄
)
₂
CO
₃
→ SrCO
₃
+
2
NH
₄
Br
Ca(ClO
₃
)
₂
→ CaCl
₂
+
3
O
₂
PCl
₅
+ H
₂
O → POCl
₃
+
2
HCl
Zn +
2
KOH → K
₂
ZnO
₂
+ H
₂
Al
₂
O
₃
+ Na
₂
CO
₃
→
2
NaAlO
₂
+ CO
₂
Zn +
2
HCl → ZnCl
₂
+ H
₂
2
NaHCO
₃
→ Na
₂
CO
₃
+ CO
₂
+ H
₂
O
SiC +
2
Cl
₂
→ SiCl
₄
+ C
NH
₃
+
2
O
₂
→ HNO
₃
+ H
₂
O
BeSO
₄
+
2
NH
₄
OH → Be(OH)
₂
+ (NH
₄
)
₂
SO
₄
Xe +
3
F
₂
→ XeF
₆
MnS +
2
HCl → H
₂
S + MnCl
₂
CaC
₂
+
2
H
₂
O → C
₂
H
₂
+ Ca(OH)
₂
2
ClO
₂
+ H
₂
O → HClO
₂
+ HClO
₃
CuSO
₄
+
2
KCN → Cu(CN)
₂
+ K
₂
SO
₄
2
NaOH + FeSO
₄
→ Na
₂
SO
₄
+ Fe(OH)
₂
Ca(OH)
₂
+ H
₃
PO
₄
→ CaHPO
₄
+
2
H
₂
O
PbCrO
₄
+
2
HNO
₃
→ Pb(NO
₃
)
₂
+ H
₂
CrO
₄
2
HgO →
2
Hg + O
₂
(CN)
₂
+
2
NaOH → NaCN + NaOCN + H
₂
O
BaCO
₃
+
2
HNO
₃
→ Ba(NO
₃
)
₂
+ CO
₂
+ H
₂
O
CaO +
2
C → CaC
₂
+ CO
AlN +
3
H
₂
O → NH
₃
+ Al(OH)
₃
CaCO
₃
+
2
HCl → CaCl
₂
+ H
₂
O + CO
₂
2
NaOH + Cl
₂
→ NaCl + NaClO + H
₂
O
VO
₂
Cl +
2
NH
₄
OH → NH
₄
VO
₃
+ NH
₄
Cl + H
₂
O
(NH
₄
)
₂
Cr
₂
O
₇
→ Cr
₂
O
₃
+ N
₂
+
4
H
₂
O
2
H
₂
O
₂
→
2
H
₂
O + O
₂
2
N
₂
+ O
₂
→
2
N
₂
O
2
Cu(CN)
₂
→
2
CuCN + C
₂
N
₂
Fe
₂
(C
₂
O
₄
)
₃
→
2
FeC
₂
O
₄
+
2
CO
₂
2
H
₂
+ O
₂
→
2
H
₂
O
2
K + Br
₂
→
2
KBr
2
CO + O
₂
→
2
CO
₂
2
HNO
₂
+ O
₂
→
2
HNO
₃
3
O
₂
→
2
O
₃
2
H
₃
AsO
₄
→ As
₂
O
₅
+
3
H
₂
O
Zn(OH)
₂
+
2
NaOH → Na
₂
ZnO
₂
+
2
H
₂
O
2
HNO
₃
+ P
₂
O
₅
→ N
₂
O
₅
+
2
HPO
₃
UF
₄
+
2
Mg →
2
MgF
₂
+ U
Mn
₂
O
₃
+
2
Al → Al
₂
O
₃
+
2
Mn
Ca
₃
(PO
₄
)
₂
+
2
H
₂
SO
₄
→
2
CaSO
₄
+ Ca(H
₂
PO
₄
)
₂
S +
2
N
₂
O → SO
₂
+
2
N
₂
N
₂
+
3
H
₂
→
2
NH
₃
As
₂
O
₃
+
3
H
₂
O →
2
H
₃
AsO
₃
Be(OH)
₂
+
2
NH
₄
HF
₂
→ (NH
₄
)
₂
BeF
₄
+
2
H
₂
O
2
NaOH + Zn(NO
₃
)
₂
→
2
NaNO
₃
+ Zn(OH)
₂
2
MgNH
₄
PO
₄
→ Mg
₂
P
₂
O
₇
+
2
NH
₃
+ H
₂
O
2
H
₃
PO
₄
+ Ca(OH)
₂
→ Ca(H
₂
PO
₄
)
₂
+
2
H
₂
O
2
CaS +
2
H
₂
O → Ca(HS)
₂
+ Ca(OH)
₂
(NH
₄
)
₂
BeF
₄
→ BeF
₂
+
2
NH
₃
+
2
HF
Sn(OH)
₂
+
2
NaOH → Na
₂
SnO
₂
+
2
H
₂
O
2
NH
₄
VO
₃
→ V
₂
O
₅
+
2
NH
₃
+ H
₂
O
2
H
₃
AsO
₃
→ As
₂
O
₃
+
3
H
₂
O
2
NaCl + H
₂
SO
₄
→ Na
₂
SO
₄
+
2
HCl
2
Fe(OH)
₃
→ Fe
₂
O
₃
+
3
H
₂
O
As
₂
O
₅
+
3
H
₂
O →
2
H
₃
AsO
₄
B
₂
O
₃
+
3
H
₂
O →
2
H
₃
BO
₃
CH
₄
+
2
O
₂
→ CO
₂
+
2
H
₂
O
SiH
₄
+
2
O
₂
→ SiO
₂
+
2
H
₂
O
TiCl
₄
+
2
Mg →
2
MgCl
₂
+ Ti
Pb(OH)
₂
+
2
NaOH → Na
₂
PbO
₂
+
2
H
₂
O
Si +
2
NaOH + H
₂
O → Na
₂
SiO
₃
+
2
H
₂
4
Si + S
₈
→
2
Si
₂
S
₄
2
CaS
₂
+
3
O
₂
→
2
CaS
₂
O
₃
Na
₂
SnO
₃
+
2
H
₂
S → SnS
₂
+
2
NaOH + H
₂
O
2
HCl + K
₂
CO
₃
→
2
KCl + H
₂
O + CO
₂
Zn +
2
NaOH +
2
H
₂
O → Na
₂
Zn(OH)
₄
+ H
₂
Na
₂
CO
₃
+
2
HCl →
2
NaCl + H
₂
O + CO
₂
CaS +
2
H
₂
O +
2
CO
₂
→ Ca(HCO
₃
)
₂
+ H
₂
S
Sn(OH)
₄
+
2
NaOH → Na
₂
SnO
₃
+
3
H
₂
O
Ca
₃
(PO
₄
)
₂
+
3
SiO
₂
→
3
CaSiO
₃
+ P
₂
O
₅
FeCl
₃
+
3
NH
₄
OH → Fe(OH)
₃
+
3
NH
₄
Cl
AlCl
₃
+
3
AgNO
₃
→
3
AgCl + Al(NO
₃
)
₃
3
KOH + AlCl
₃
→
3
KCl + Al(OH)
₃
SiO
₂
+
4
HF → SiF
₄
+
2
H
₂
O
CaCN
₂
+
3
H
₂
O → CaCO
₃
+
2
NH
₃
3
HCl + HNO
₃
→ NOCl + Cl
₂
+
2
H
₂
O
4
KClO
₃
→
3
KClO
₄
+ KCl
P
₄
+
5
O
₂
→
2
P
₂
O
₅
P
₄
O
₁₀
+
3
HCl → POCl
₃
+
3
HPO
₃
4
Sb +
3
O
₂
→ Sb
₄
O
₆
3
KBr + Al(ClO
₄
)
₃
→ AlBr
₃
+
3
KClO
₄
3
AgNO
₃
+ FeCl
₃
→ Fe(NO
₃
)
₃
+
3
AgCl
Ca
₃
(PO
₄
)
₂
+
4
H
₃
PO
₄
→
3
Ca(H
₂
PO
₄
)
₂
POCl
₃
+
3
H
₂
O → H
₃
PO
₄
+
3
HCl
UO
₂
+
4
HF → UF
₄
+
2
H
₂
O
Ag
₂
S +
4
KCN →
2
KAg(CN)
₂
+ K
₂
S
PCl
₃
+
3
H
₂
O → H
₃
PO
₃
+
3
HCl
MnO
₂
+
4
HCl → MnCl
₂
+
2
H
₂
O + Cl
₂
3
PCl
₅
+ P
₂
O
₅
→
5
POCl
₃
Au +
3
HCl + HNO
₃
→ AuCl
₃
+ NO +
2
H
₂
O
SiCl
₄
+
4
H
₂
O → H
₄
SiO
₄
+
4
HCl
4
P
₄
O
₆
→ P
₄
+
6
P
₂
O
₄
P
₄
O
₁₀
+
6
H
₂
O →
4
H
₃
PO
₄
H
₃
PO
₄
+
5
HCl → PCl
₅
+
4
H
₂
O
PCl
₅
+
4
H
₂
O → H
₃
PO
₄
+
5
HCl
P
₄
O
₆
+
6
H
₂
O →
4
H
₃
PO
₃
4
H
₃
BO
₃
+ Na
₂
CO
₃
→ Na
₂
B
₄
O
₇
+ CO
₂
+
6
H
₂
O
6
H
₃
BO
₃
→ H
₄
B
₆
O
₁₁
+
7
H
₂
O
Ca
₃
(PO
₄
)
₂
+
8
C → Ca
₃
P
₂
+
8
CO
S
₈
+
12
O
₂
→
8
SO
₃
2
KClO
₃
→
2
KCl +
3
O
₂
2
Ca(OH)
₂
+ P
₄
O
₁₀
+
2
H
₂
O →
2
Ca(H
₂
PO
₄
)
₂
2
Na +
2
H
₂
O →
2
NaOH + H
₂
H
₂
SO
₄
+
2
NaHCO
₃
→ Na
₂
SO
₄
+
2
CO
₂
+
2
H
₂
O
2
NH
₄
Cl + Ca(OH)
₂
→ CaCl
₂
+
2
NH
₃
+
2
H
₂
O
C
₂
H
₅
OH +
2
O
₂
→
2
CO +
3
H
₂
O
2
C + SiO
₂
+
2
Cl
₂
→ SiCl
₄
+
2
CO
Fe
₂
O
₃
+
3
C →
3
CO +
2
Fe
3
FeO +
2
H
₃
PO
₄
→ Fe
₃
(PO
₄
)
₂
+
3
H
₂
O
2
Ca(NO
₃
)
₂
→
2
CaO +
4
NO
₂
+ O
₂
4
Fe +
3
O
₂
→
2
Fe
₂
O
₃
Fe
₂
O
₃
+
3
H
₂
→
2
Fe +
3
H
₂
O
4
Al +
3
O
₂
→
2
Al
₂
O
₃
3
BaCl
₂
+ Al
₂
(SO
₄
)
₃
→
3
BaSO
₄
+
2
AlCl
₃
Fe
₂
(SO
₄
)
₃
+
3
Ba(NO
₃
)
₂
→
3
BaSO
₄
+
2
Fe(NO
₃
)
₃
Au
₂
S
₃
+
3
H
₂
→
2
Au +
3
H
₂
S
2
Al +
3
FeO → Al
₂
O
₃
+
3
Fe
C
₂
H
₅
OH +
3
O
₂
→
2
CO
₂
+
3
H
₂
O
2
Na
₂
O
₂
+
2
H
₂
O →
4
NaOH + O
₂
Fe
₂
O
₃
+
3
CO →
2
Fe +
3
CO
₂
2
Pb(NO
₃
)
₂
→
2
PbO +
4
NO
₂
+ O
₂
Al
₂
(SO
₄
)
₃
+
3
Ca(OH)
₂
→
3
CaSO
₄
+
2
Al(OH)
₃
2
Au
₂
O
₃
→
4
Au +
3
O
₂
Ca
₃
(PO
₄
)
₂
+
3
H
₂
SO
₄
→
3
CaSO
₄
+
2
H
₃
PO
₄
Ca +
2
AlCl
₃
→
3
CaCl
₂
+
2
Al
Al
₂
O
₃
+
3
C + N
₂
→
2
AlN +
3
CO
4
NO +
2
NaOH →
2
NaNO
₂
+ H
₂
O + N
₂
O
Pb
₃
O
₄
+
4
HNO
₃
→
2
Pb(NO
₃
)
₂
+ PbO
₂
+
2
H
₂
O
K
₂
CO
₃
+
4
C + N
₂
→
2
KCN +
3
CO
2
Al(OH)
₃
+
3
H
₂
SO
₄
→ Al
₂
(SO
₄
)
₃
+
6
H
₂
O
Fe
₂
(SO
₄
)
₃
+
6
KOH →
3
K
₂
SO
₄
+
2
Fe(OH)
₃
2
Bi(NO
₃
)
₃
+
3
H
₂
S → Bi
₂
S
₃
+
6
HNO
₃
V
₂
O
₅
+
6
HCl →
2
VOCl
₃
+
3
H
₂
O
2
Cr(OH)
₃
+
3
H
₂
SO
₄
→ Cr
₂
(SO
₄
)
₃
+
6
H
₂
O
3
Hg(OH)
₂
+
2
H
₃
PO
₄
→ Hg
₃
(PO
₄
)
₂
+
6
H
₂
O
3
Fe +
4
H
₂
O → Fe
₃
O
₄
+
4
H
₂
Ca
₃
P
₂
+
6
H
₂
O →
3
Ca(OH)
₂
+
2
PH
₃
3
H
₂
SO
₄
+
2
Al(OH)
₃
→ Al
₂
(SO
₄
)
₃
+
6
H
₂
O
2
Al(NO
₃
)
₃
+
3
Na
₂
CO
₃
→ Al
₂
(CO
₃
)
₃
+
6
NaNO
₃
2
Na
₃
AsO
₃
+
3
H
₂
S → As
₂
S
₃
+
6
NaOH
Mg
₃
N
₂
+
6
H
₂
O →
3
Mg(OH)
₂
+
2
NH
₃
Fe
₃
O
₄
+
4
H
₂
→
3
Fe +
4
H
₂
O
C
₃
H
₈
+
5
O
₂
→
3
CO
₂
+
4
H
₂
O
V
₂
O
₅
+
5
Ca →
5
CaO +
2
V
Pb +
4
Na +
4
C
₂
H
₅
Cl → Pb(C
₂
H
₅
)
₄
+
4
NaCl
H
₂
SO
₄
+
8
HI → H
₂
S +
4
I
₂
+
4
H
₂
O
Al
₄
C
₃
+
12
H
₂
O →
3
CH
₄
+
4
Al(OH)
₃
12
HClO
₄
+ P
₄
O
₁₀
→
4
H
₃
PO
₄
+
6
Cl
₂
O
₇
6
CO
₂
+
6
H
₂
O → C
₆
H
₁₂
O
₆
+
6
O
₂
P
₄
+
16
H
₂
O →
4
H
₃
PO
₄
+
10
H
₂
8
H
₂
S +
8
Cl
₂
→ S
₈
+
6
HCl
C
₁₀
H
₁₆
+
8
Cl
₂
→
10
C +
16
HCl
C
₇
H
₁₆
+
11
O
₂
→
7
CO
₂
+
8
H
₂
O
2
NH
₃
+
3
O
₂
→
2
HNO
₂
+
2
H
₂
O
2
NiS +
3
O
₂
→
2
NiO +
2
SO
₂
2
FeCl
₃
+
3
Ca(OH)
₂
→
3
CaCl
₂
+
2
Fe(OH)
₃
2
CuSO
₄
+
4
KCN →
2
CuCN +
2
K
₂
SO
₄
+ C
₂
N
₂
4
KO
₂
+
2
CO
₂
→
2
K
₂
CO
₃
+
3
O
₂
2
MnO
₂
+
4
KOH + O
₂
→
2
K
₂
MnO
₄
+
2
H
₂
O
2
C
₂
H
₂
+
5
O
₂
→
4
CO
₂
+
2
H
₂
O
2
As +
6
NaOH →
2
Na
₃
AsO
₃
+
3
H
₂
2
Al +
6
HCl →
2
AlCl
₃
+
3
H
₂
Na
₂
B
₄
O
₇
+
2
HCl +
5
H
₂
O →
2
NaCl +
4
H
₃
BO
₃
2
Ca
₃
(PO
₄
)
₂
+
6
SiO
₂
→ P
₄
O
₁₀
+
6
CaSiO
₃
3
Se +
6
NaOH →
2
Na
₂
Se + Na
₂
SeO
₃
+
3
H
₂
O
2
K
₃
AsO
₄
+
5
H
₂
S → As
₂
S
₅
+
6
KOH +
2
H
₂
O
I
₂
+
6
HNO
₃
→
2
HIO
₃
+
6
NO
₂
+
2
H
₂
3
Al +
3
NH
₄
ClO
₄
→ Al
₂
O
₃
+ AlCl
₃
+
3
NO +
6
H
₂
O
4
FeS +
7
O
₂
→
2
Fe
₂
O
₃
+
4
SO
₂
2
(NH
₄
)
₃
AsS
₄
+
6
HCl → As
₂
S
₅
+
3
H
₂
S +
6
NH
₄
Cl
4
NH
₃
+
5
O
₂
→
4
NO +
6
H
₂
O
4
Hg
₂
CrO
₄
→
2
Cr
₂
O
₃
+
8
Hg +
5
O
₂
Ca
₁₀
F
₂
(PO
₄
)
₆
+
7
H
₂
SO
₄
→
3
Ca(H
₂
PO
₄
)
₂
+
7
CaSO
₄
+
2
HF
4
NH
₃
+
6
NO →
5
N
₂
+
6
H
₂
O
3
V
₂
O
₅
+
10
Al →
5
Al
₂
O
₃
+
6
V
4
FeS
₂
+
11
O
₂
→
2
Fe
₂
O
₃
+
8
SO
₂
4
Si
₂
H
₃
+
11
O
₂
→
8
SiO
₂
+
6
H
₂
O
2
C
₄
H
₁₀
+
13
O
₂
→
8
CO
₂
+
10
H
₂
O
2
C
₆
H
₆
+
15
O
₂
→
12
CO
₂
+
6
H
₂
O
2
C
₇
H
₆
O
₂
+
15
O
₂
→
14
CO
₂
+
6
H
₂
O
2
Al +
2
KOH +
2
H
₂
O →
2
KAlO
₂
+
3
H
₂
2
(NH
₄
)
₂
Cr
₂
O
₇
→
4
NH
₃
+
2
H
₂
O +
2
Cr
₂
O
₃
+
3
O
₂
2
C
₂
H
₃
Cl +
5
O
₂
→
4
CO
₂
+
2
H
₂
O +
2
HCl
2
Al +
2
NaOH +
6
H
₂
O →
2
NaAl(OH)
₄
+
3
H
₂
2
Ca
₃
(PO
₄
)
₂
+
6
SiO
₂
+
10
C →
6
CaSiO
₃
+ P
₄
+
10
CO
2
C
₇
H
₁₀
N +
21
O
₂
→
14
CO
₂
+
10
H
₂
O +
2
NO
₂