CHEM 121 Study Guide - Final Guide: Neon Neon, Physical Property, Decimal Mark

• School: Towson University
• Department: Chemistry
• Course: CHEM 121
• Professor: Jennifer Bresett

Document Summary

Rule 1: all nonzero digits are significant. Rule 2: the number of significant digits is independent of the position of the decimal point. Rule 3: zeros located between nonzero digits are significant. Rule 4: zeros at the end of a number (trailing zeros) are significant if the number contains a decimal point. Rule 5: trailing zeros are insignificant if the number does not contain a decimal point. Rule 6: zeros to the left of the first nonzero integer are not significant. Multiplication/division : multiplication > use the fewest number of significant figures, division > use the fewest number of significant figures. Addition/subtraction : addition > use the fewest number of decimal places, subtraction > use the fewest number of decimal places, conversions: Fahrenheit to celsius > f = 1. 8 * c + 32. Celsius to fahrenheit > c = (c - 32) / 1. 8. Celsius to kelvin > k = c + 273.