Question

1. Define a chemical change. 2. How can you represent the chemical reaction in a short form? 3. What are reactants and products? 4. Differentiate between a word equation and a chemical equation. 5. Define a combination reaction and give two examples with equations. 6. What are exothermic reactions?Give two examples. 7. What are endothermic reactions? 8. Why should we clean magnesium ribbon before burning in air? 9. Why is respiration considered an exothermic reaction? 10. What happens when a. water is added slowly to quick lime b. 1g of ammonium chloride is added to 2g of barium hydroxide in a test tube Write the necessary equations

Answer 1

Answer:

1.the change in which one or more substance combine to form an new substance with new properties