1. Week13 1. The reaction for photosynthesis is 6CO 2 + 6H 2 O  C 6 H 12 O 6 + 6O 2. How many oxygen atoms, O, are released for every 1 glucose, C 6 H 12 O 6, produced? a.1c. 6 b.2d. 12 2. Which of these is an example of a covalent compound? a.Sodium monochloride b.Trimagnesium dinitride c.Calcium chloride d.Sulfur dioxide

2. 3. The formula for dinitrogen tetraoxide is A.N 3 O 3 B.NO C.N 2 O 2 D.N 2 O 4 4. Which of the following is a characteristic of an ionic bond? A.Low melting point B.Shares electrons C.Good conductor of electricity in aqueous solutions D.Insoluble

3. 5. Complete the following reaction. NaOH (aq) + HCl (aq)  ______ + H 2 O (l) A.2NaCl (s) B.NaCl (g) C.NaCl (aq) D.2NaCl (aq) 6. Which of the following is a true statement? a.Matter is conserved in a chemical reaction. b.Matter is created in a chemical reaction. c.Matter is destroyed in a chemical reaction. d.All of the above statements can be true depending on the reaction.

4. 7. Which of the following involves a chemical change? A.Snow melting into water B.An apple rotting on a tree C.Boiling water until vapor forms D.Making sweet iced tea

5. 8. The following reaction is propane burning in oxygen to produce carbon dioxide and steam. __C 3 H 8 + __O 2  __CO 2 + __H 2 O Which of the following sets of numbers will balance this equation? A.1, 5, 3, 4 B.1, 3, 4, 5 C.5, 4, 3, 1 D.4, 5, 1, 3

6. 9. In chemistry class, Mr. V added some sodium to a beaker of water. The sodium reacts violently with the water, producing a flame. The end products are hydrogen gas and sodium hydroxide. Which of the following is the correct balanced equation for the reaction described above? A.2 Na + 2 H 2 O  2 NaOH + H 2 B.Na + H 2 O + O 2  3 NaOH + H 2 C.H 2 O 2 + 2Na  2 NaOH + H 2 D.2 NaOH + H 2  2 Na + 2 H 2 O

7. 10. The electrolysis of water is performed by passing an electric current through water to break the chemical bonds that hold it together. What kind of reaction is this? 2 H 2 O  2H 2 + O 2 a.Synthesis b.Decomposition c.Single replacement d.Double replacement