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Unformatted text preview: hyun (hh7953) – Homework 2 – Sparks – (53435) 1 This print-out should have 20 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points Which is the highest temperature? 1. 350 K 2. 150 ◦ F 3. 100 ◦ C correct 4. 50 ◦ C 5. 50 K Explanation: Two answer choices, 50 K and 50 ◦ C, are easy to omit. Of the remaining three, note that 100 ◦ C is the normal boiling point of water, while 150 ◦ F and 350 K are under the normal boiling point of water. Normal Boiling Point of Water in various temperature scales Scale Boiling Point Fahrenheit 212 ◦ F Celsius 100 ◦ C Kelvin 373 K 002 10.0 points Almost all human activity is conducted in the 1. troposphere. correct 2. stratosphere. 3. mesosphere. 4. ionosphere. Explanation: The troposphere is the layer of the atmo- sphere closest to the earth’s surface; it extends upward for about 15 km. 003 10.0 points Usually the symptom of carbon monoxide poi- soning is 1. yellowing of the eyes and skin. 2. uncontrollable shaking. 3. shortness of breath. 4. drowsiness. correct Explanation: 004 10.0 points Of the following elements, the one which is NOT a metal is 1. iron. 2. cobalt. 3. silver. 4. potassium. 5. arsenic. correct Explanation: Iron, cobalt, silver, and potassium are all metals since they are to the left of the line dividing metals and non-metals. Arsenic is the only element to the right of that line. 005 10.0 points Which element is in the same group as Si? 1. N 2. S 3. As 4. Sn correct 5. Mg Explanation: Tin (Sn) is in the same vertical column (group) as silicon (Si) and would be expected to have similar properties according to the periodic law. hyun (hh7953) – Homework 2 – Sparks – (53435) 2 006 10.0 points According to the Periodic Law, which of the following should have properties similar to carbon? 1. H 2. N 3. B 4. Si correct Explanation: Remember that the periodic law predicts that atoms in the same family or group (ver- tical column)will have similar properties....
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- Fall '09
- Chemistry, correct explanation, Hyun, smallest possible integers