CHE 131 Study Guide - Midterm Guide: Combustibility And Flammability, Metalloid, Molar Mass

• School: Stony Brook University
• Department: Chemistry
• Course: CHE 131
• Professor: Benjamin Hsaio, Jiangyong Jia, Roy Lacey

Document Summary

Can be observed without changing into another substance. Dependent with amount of substance there is volume , length, enthalpy. You observe the phenomena of what you are studying. You make a hypothesis based on the observations. You prepare an experiment to test out your hypothesis. You make a theory based on the data and results of your experiment. All scientific measures are subject to error. Precision- consistency of #s reported (several experiments made) Answer should have as many sig fig as the fewest sig fig # Answer should have as many decimal point as fewest decimal points. 3. 75 + 4. 1 = 7. 85 least # of decimal is 4. 1 so 7. 9. 224 + 130 = 354 -> 2=350. Unit conversion factor is a fraction that takes two equivalent values with different unit. Simplest type of matter with unique physical and chemical properties. Properties of an atom has nothing to do with source of element properties are solely unique.