Question

this passage describes a chemical reaction. read the passage. then, follow the instructions below. have you ever eaten food that was cooked on a grill? some grills are powered by propane gas. the propane combines with oxygen in the air to make carbon dioxide gas and water vapor. this process releases energy in the form of heat, creating a flame that cooks the food. complete the sentence. in this chemical reaction, oxygen is a ______. reactant product

Explanation:

In a chemical reaction, reactants are the substances that participate in the reaction and are consumed to form products. The passage states that propane combines with oxygen to form carbon dioxide and water vapor. So oxygen is a reactant (since it's a substance that reacts, not a substance formed from the reaction like the products carbon dioxide and water vapor).

Answer:

reactant