Final answer:
The word equation that shows hydrogen reacting with oxygen to form water is hydrogen + oxygen = water. This equation represents the chemical reaction where two molecules of hydrogen gas react with one molecule of oxygen gas to produce two molecules of water vapor.
Step-by-step explanation:
The word equation that shows hydrogen reacting with oxygen to form water is hydrogen + oxygen = water. This equation represents the chemical reaction where two molecules of hydrogen gas react with one molecule of oxygen gas to produce two molecules of water vapor. It can also be written in chemical shorthand as 2H₂ + O₂ → 2H₂O. The coefficients in the equation indicate the molar amounts of reactants and products.