Which of the following equations are balanced?

A: 2H2 + O2 → 2H2O

B: 2S + 3O2 → 2SO3

C: Li + Cl2 → LiCl

D: 2K + 2H2O → H2 + 2KOH

E: 2Fe + Cu (NO3) 2 → 2Cu + Fe (NO3) 2

A: 2H₂ + O₂ → 2H₂O

H: 4 H:4

O: 2 O: 2

The equation is balanced.

B. 2S + 3O₂ → 2SO₃

S: 2 S: 2

O: 6 O: 6

The equation is balanced.

C. Li + Cl₂ → LiCl

Li: 1 Li: 1

Cl: 2 Cl: 1

The equation is not balanced.

2Li + Cl₂ → 2LiCl

Li: 2 Li: 2

Cl: 2 Cl: 2

D: 2K + 2H₂O → H₂ + 2KOH

K: 2 K: 2

H: 4 H: 4

O: 2 O: 2

The equation is balanced.

E: 2Fe + Cu (NO₃) ₂ → 2Cu + Fe (NO₃) ₂

Fe: 2 Fe: 1

Cu: 1 Cu: 2

N: 2 N: 2

O: 6 O: 6

The equation is not balanced.

2Fe + 2Cu (NO₃) ₂ → 2Cu + 2Fe (NO₃) ₂

Fe: 2 Fe: 2

Cu: 2 Cu: 2

N: 4 N: 4

O: 12 O: 12

The following equations that are balanced are A, B, and D.