Grossmont College Chemistry 120 Exam I Fall 2018 Date: Section \": Instructor: E
ID: 716704 • Letter: G
Question
Grossmont College Chemistry 120 Exam I Fall 2018 Date: Section ": Instructor: Ewa Zajac Name: Exam 1- Group A Directions: Please cirele the best answer for each of the follewing questions. I. Which element is not a representative element? a. Aluminum e. Potassium e. Iron b. Sulfur d. Boron 2. Which of the following numbers are correctly expressed in scientific notation? 43,200,000 -4.32 10' . 0.000977-9.77 10* ili606,000 6.06 10 iv. 0.00000175 1.75 x 10 a. i and iv b. ii and ii e. i and ili d. ii and iv e. All of the above 0 1 2 3 456 7 89 10 0.1mm 3. What is the measurement shown by the calipers? b. 0.8 cm c. 10.5 cm d. 19.8 cm e. 26.8 cm 4. Convert 32.7 m to mm. a. 32,700 mm b. 0.0327 mm c. 327 mm d. 0.0327 mm e. 0.327mm 5. Consider a situation in which you are walking at 3.7 miles per hour. Which of the following per expression is rue? a. 3.7 mi-1 hr 3.7 m 1 hr 1 hr c. d. e. 3.7 mi Distance in miles is directly proportional to time in hours. all of the above Page 1 of 5Explanation / Answer
1.Iron Is not a representative Element.Answer (e)
Representative elements are those elements present in Group I and II , Group 13-18. Fe present in Group 8
2.(a) i and iv are written corectly
3(b) caliper measurements is O.8 cm. Measurements taken when caliper lower matches with upper that reading is taken.
4.(a) 32.7 m= 3270 cm= 327000 mm
5. (b) 3.7mi/1 hr
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