1. Unit 4 Retest: Chemical Formulas, Equations, and Reactions

2. 1. The chemical formula for glucose is shown. C 6 H 12 O 6 Describe the structure of the chemical compound identified by the formula. Be sure to include the number of elements, the number of atoms of each element, and the number or molecules of the compound shown.

3. 2. A chemical equation is shown. 3H 2 + 3Cl 2 → HCl Is this equation balanced? Explain your answer including the characteristics of a balanced equation.

4. 3. What classifies something as a chemical reaction?

5. OOPS! 4. List three observations that could be evidence of a chemical reaction.