CHEM 132 Lecture Notes - Lecture 1: Scientific Notation, Trailing Zero, Kilogram
Document Summary
Chemistry- the study of matter and the transformation it undergoes from one form to another or physical transformations. Science- a body of knowledge or the process. Applied research aims to gained from basic research. The scientific process greater understanding of how the natural world develop useful applications from the knowledge. Consist of: observations, questions, hypothesis (testable), predictions, and test. Theory- a single comprehensive idea that has stood up to repeated scrutiny (ex. Mass- a measure of the quantity of material it contains. Scientific notation is used to write a very large or very small numbers. That is written 6. 02 x 10^23 = 1 mole = avogadro"s number. All non-zero digits are significant: significant zeros (sandwiched zeros): 306 = 3 significant figures, decimal points (zeros to the point), 5. 00 = 3 significant figures, 5. 0 = 2 significant figures, 5 = 1 significant figure. Exact numbers are counting numbers or definitions (12 inches = 1 foot)
