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Quiz 1 Measurement-solutions

# Quiz 1 Measurement-solutions - Version 083/ABBAD Quiz 1...

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Version 083/ABBAD – Quiz 1 Measurement – lyon – (51155) 1 This print-out should have 10 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 1 2 3 4 5 6 7 AA AB AC AD BA BB BC 8 9 10 BACK NEXT BD CA CB CC CD 001 10.0points Which of the course assignments have at least one score dropped at the end of the semester? A) post-lab; B) lab report; C) quiz; D) TA evaluation. 1. A, C, & D 2. B & C 3. B, C, & D correct 4. All the assignments listed have the lowest score dropped at the end of the semester. 5. A, B, & C Explanation: All guidelines are covered in the syllabus. 002 10.0points Complete the following calculation of mea- surements to the correct number of significant figures. 4 . 00 g (12 mL - 2 . 00 mL ) =? 1. 0 . 400 g / mL 2. 0 . 40 g / mL correct 3. 0 . 040 g / mL 4. 0 . 04 g / mL 5. 0 . 4 g / mL Explanation: When subtracting, it is the number of dec- imal places that determines the number of significant figures in the answer. There are two significant figures after the subtraction. When dividing, the number of significant fig- ures is determined by the number with the least number of significant figures. Since the

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