Final Exam Name: Date: 1. Different arrangements of atoms are shown in the 3. figures below. The above picture shows a light bulb connected to Which figure represents a mixture? a battery with the circuit interrupted by a solution. When dissolved in the water to form a 1.0 molar A. Figure 1 B. Figure 2 complete a circuit allowing the bulb to light except C. Figure 3 D. Figure 4 A. hydrochloric acid. B. sodium nitrate. C. sucrose. D. ammonium sulfate. 2. The following equations represent chemical reactions. 4. H2O2, hydrogen peroxide, naturally breaks down into H2O and O2 over time. MnO2, manganese dioxide, can be used to lower the energy of activation needed for this reaction to take place and, thus, increase the rate of reaction. What type of substance is MnO2? Which equation shows that the total mass during a chemical reaction stays the same? A. a catalyst B. an enhancer C. an inhibitor D. a reactant A. 1 B. 2 C. 3 D. 4 page 1
Final Exam Name: Date: 1. Different arrangements of atoms are shown in the figures below. 3. Which figure represents a mixture? A. Figure 1 B. Figure 2 C. Figure 3 D. Figure 4 2. The following equations represent chemical reactions. Which equation shows that the total mass during a chemical reaction stays the same? A. 1 B. 2 C. 3 D. 4 The above picture shows a light bulb connected to a battery with the circuit interrupted by a solution. When dissolved in the water to form a 1.0 molar complete a circuit allowing the bulb to light except A. hydrochloric acid. B. sodium nitrate. C. sucrose. D. ammonium sulfate. 4. H2O2, hydrogen peroxide, naturally breaks down into H2O and O2 over time. MnO2, manganese dioxide, can be used to lower the energy of activation needed for this reaction to take place and, thus, increase the rate of reaction. What type of substance is MnO2? A. a catalyst B. an enhancer C. an inhibitor D. a reactant page 1
final_exam_questions.docx