CHEM 208 Study Guide - Midterm Guide: Hemoglobin, Workplace Hazardous Materials Information System, Ethylene Oxide

• School: Concordia University
• Department: Chemistry
• Course: CHEM 208
• Professor: Bhuvan Pant

Document Summary

Step 3: proposing a hypothesis (based upon the observations made) Step 4: confirming the hypothesis (by repeated experimentation) Rule #1: all nonzero digits are significant figures. Rule #2: counting begins from the left with the first nonzero number. Rule #3: zeros between nonzero digits are counted as significant figures. Rule #4 terminal zeros (zeros to the right of a number) Rule #1: in addition/subtraction, the final answer contains the same number of decimal places as are in the measurement with the last number of decimal places. Rule #2: in multiplication and division of measured quantities, the final answer contains the same number of decimal places as are in the measurement with the last number of decimal places. Rule #3: the final answer of a calculation involving exact numbers, unit conversion factors and constants, the number of significant figures is dictated by the measured quantity involved.