For the skeletal chemical equation LaC2 (g) + H2O (ℓ) → La (OH) 3 (s) + C2H2 (g) + H2 (g) what is the coefficient of C2H2 in the balanced equation?

The answer to your question is 2

Explanation:

1. - Write the equation a check if it is balanced or not

LaC₂ + H₂O ⇒ La (OH) ₃ + C₂H₂ + H₂

1 - La - 1

2 - C - 2

2 - H - 7

1 - O - 3

2. - The reaction is not balanced so lets do it

LaC₂ + 3H₂O ⇒ La (OH) ₃ + C₂H₂ + H₂

1 - La - 1

2 - C - 2

6 - H - 7

3 - O - 3

LaC₂ + 3H₂O ⇒ La (OH) ₃ + C₂H₂ + 1/2H₂

1 - La - 1

2 - C - 2

6 - H - 6

3 - O - 3

2LaC₂ + 6H₂O ⇒ 2La (OH) ₃ + 2C₂H₂ + 1H₂

2 - La - 2

4 - C - 4

12 - H - 12

6 - O - 6