Temperature and Answer

| 1. | | Passing an electric current through a certain substance produces oxygen and sulfur. This substance cannot be a(n) Your Answer: | element. | | | An element cannot be broken down into other elements. | | 2. | | Pick the chemical change that occurs when a lit match is held under a piece of metal. Your Answer: | match burns | | | Chemical changes, which release heat and light, occur during the combustion process. | | 3. | | Which identification is incorrect for the elements listed? Your Answer: | Zn, zirconium | | | Zn is zinc; Zr is zirconium. | | 4. | | Which of the following statements is false? Your Answer: | A theory can be proved correct if sufficient experimental data is acquired. | | | A theory is an explanation of the general principles of a certain phenomenon, with considerable evidence of facts to support it. Although a theory can be proved wrong, it cannot be proved correct, for it is always open to modification. | | 5. | | Which of the following is an intensive quantity? Your Answer: | density of a substance | | | Density does not depend on the amount of substance. | | 6. | | Which number is incorrectly labeled? Your Answer: | 4.8 x 10-6 mL = 4.8 microliters | | | 1 microliter is equal to 1 x 10-3 mL. | | 7. | | Which of the following properties listed below is an extensive, physical property of sugar? Your Answer: | The length of the edge of an average sugar crystal is less than 1 mm. | | | The length of an edge of a sugar crystal depends on the size of the of sugar crystal in question and is an extensive property. | | 8. | | Which of the following common objects has a mass closest to 1 gram? Your Answer: | a shirt button | | | The typical small shirt button weighs about 1 gram. | | 9. | | Which of the following is an extensive property? Your Answer: | surface area | | | The amount of surface area increases with the quantity of material when