Chemical Reactions and Balancing Chemical Equations

Choose the correctly balanced equation for the following reaction: Potassium + water → potassium hydroxide + hydrogen gas

2K + 2H₂O → 2KOH + H₂

What is a coefficient?

A whole number that appears in front of a compound or element in a balanced chemical equation.

Which of the following equations is balanced?

C₂H₅OH + 3O₂ -> 2CO₂ + 3H₂O

Conservation of matter means that:

Matter is never created nor destroyed.

Choose the correctly balanced equation for the following reaction: Sodium + water -> sodium hydroxide + hydrogen gas

2Na + 2H₂O -> 2NaOH + H₂