Respuesta :

Space

Answer:

B. Hydrogen and oxygen molecules

General Formulas and Concepts:

Chemistry - Reactions

  • Reactants are always on the left side of the arrow
  • Products are always on the right side of the arrow

Explanation:

Step 1: Define

Reaction RxN:   2H₂ + O₂ → 2H₂O

Step 2: Identify

Reactants:   H₂ and O₂

Products: H₂O