Across
- 3. a measure of how fast a reaction takes place
- 5. the attachment of molecules to a solid surface
- 6. protein molecules that act as biological catalyst
- 7. the industrial manufacture of sulfuric acid using the raw materials sulfur and air
Down
- 1. a theory that states that a chemical reaction takes place when particles of the reactants collide with sufficient energy to initiate the reaction
- 2. the industrial manufacture of ammonia by the reaction of nitrogen with hydrogen in the presence of an iron catalyst
- 4. a substance that increase the rate of a chemical reaction but itself remains unchanged at the end of the reaction