4. PRODUCTS is substance that is present at the end of a cchemical reaction. 5. CHEMICAL REACTION is a process by which one or more substance also called reactants are converted to one or more different substances, known as products. Activity 2. BALANCE ME EQUALLY Directions: Solve for the complete product of a sample unbalance chemical reaction. 1. Write the formulas for all reactants to the left of an arrow and all products to the right. Be sure that the formulas correctly represent the species that exist in the reaction. 2. Once formulas are correctly written, do not change them. Use coefficient in front of the formulas to balance the equation. 3. Begin balancing with an element that occurs only once on each side of the arrow. 4. To determine the number of atoms of a given element in a term of the equation, multiply the coefficient by the subscript of the element. Try to balance it. 1. C2H4+302 292+H₂O Activity 3. FILL ME TO BALANCE Instruction: Fill in with a sample chemical to balance the given reactants to form a new product. Choose and write the letter of the correct answer. EXAMPLE 1: COMBINATION REACTION: Ana Joey = Ana and Joey 1. Carbon + oxygen a. Oxygen b. carbon dioxide c. water d. hydrogen 2. Iron filings + sulfur powder a. Iron sulfate b. iron powder c. iron sulfide d. iron with water 3. Calcium oxide + water a. Calcium hydroxide b. calcium chloride c. calcium d. water 11​