Temperature and Answer

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1.| | Passing an electric current through a certain substance produces oxygen and sulfur. This substance cannot be a(n) Your Answer:| element.|
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| An element cannot be broken down into other elements.|
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2.| | Pick the chemical change that occurs when a lit match is held under a piece of metal. Your Answer:| match burns|
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| 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|
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| Zn is zinc; Zr is zirconium.|
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4.| | Which of the following statements is false? Your Answer:| A theory can be proved correct if sufficient experimental data is acquired.|
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| 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|
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| Density does not depend on the amount of substance.|
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6.| | Which number is incorrectly labeled? Your Answer:| 4.8 x 10-6 mL = 4.8 microliters|
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| 1 microliter is equal to 1 x 10-3 mL.|
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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.|
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| 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|
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| The typical small shirt button weighs about 1 gram.|
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9.| | Which of the following is an extensive property? Your Answer:| surface area|
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| The amount of surface area increases with the quantity of material when considering geometrically similar portions.| |
10.| | The symbol for the element potassium is Your Answer:| K|
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| K is the symbol for the element potassium.|
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11.| | Which metric prefix name would replace the power of 10 in 3.68 x 10-3 m? Your Answer:| milli|
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| Milli represents 10-3.|
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12.| | The high temperature during a summer day was observed to be 92°F. What was this temperature in °C? Your Answer:| 33|
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| You correctly used the following calculation to determine the temperature in °C .| |
13.| | Which one of the following is an extensive property? Your Answer:| mass|
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| Mass is dependent on the size or amount of the sample.| |
14.| | Which of the following statements can be used to describe the study of chemistry? Your Answer:| A chemical theory is developed by testing a hypothesis that tentatively attempts to explain a set of observations and experiments.|

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| This general sequence is sometimes called the "scientific method."| |
15.| | The density of liquid bromine is 3.12 g/mL. What is the mass of 0.250 L of bromine? Your Answer:| 780. g|
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16.| | 7.00 yd3 = ______ m3. Your Answer:| 5.35|
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17.| | Which set of measurements on a 2.00-gram standard is the most precise? Your Answer:| 2.00 g, 2.01 g, 1.98 g|
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| These measurements are closer to each other than the other choices.| |
18.| | Which conversion to standard exponential notation is incorrect? Your Answer:| 4354 x 10-4 = 4.354 x 10-1| | Correct Answer:| 0.00654 x 10-6 = 6.54 x 10-3| |
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| These are equal.|
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19.| | Which of the indicated number of significant figures is incorrect? Your Answer:| 4.0 x 102 (one significant figure)|
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| This number has two significant figures.|
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20.| | An object will sink in a liquid if the density of the object is greater than that of the liquid. If the mass of an object is 9.83 g, what volume must it have in...
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