CHE 131 Study Guide - Midterm Guide: Molar Concentration, Nitrite, Reagent

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

Document Summary

Intensive property: a characterisic that is independent of the amount of substance present; it is scale invariant. Extensive property: a characterisic that varies with the quanity of the substance present. Trailing zeros without a decimal point 2,500. Muliply/divide the # with the least sig igs determines the # of sig igs in the answer. Add/subtract the # with the smallest number of decimal places. Homogeneous distributed uniformly throughout the sample. Heterogeneous individual components can be seen as separate domains. Neutron mass # - atomic # Electron atomic # - charge # Isotopes: atoms of the same element with diferent number of neutrons. Difer in mass number but never in atomic number. Average atomic mass = (mass)(%abundance) + (mass)(%abundance)/ 100. Covalent non metal + non metal. Ionic compounds (metal/nonmetal: name = (caion)(anion)ide, ex: na2o = sodium oxide, naming caions with more than one charge use roman numerals.