CHEM 1151- Final Exam Guide - Comprehensive Notes for the exam ( 61 pages long!)
30 Nov 2017
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Macroscopic-microscopic nature of matter solids: fixed volume liquids: assume shape of container gases: expand to occupy entire container supercritical fluids: intermediate between liquids and gases. Physical properties optical color of light , nm intensity of light, p(power), %t, or a magnetic susceptibility (unitless) susceptibility (unitless) electrical conductivity, -1cm = s/cm thermal temperature, t ( c or k) Measurements in chem quantitative data is properly represented with units, prefixes, and sig figs. Systeme internationale (si) exact numbers have no specific number of sig figs ie 2. 00 or. 102 rounding: treat remaining digits as a fraction. 1/2 mass of 12c essentially mass of a proton/neutron neutrons: electrically neutral, mass = 1. 009amu protons: positively charged (1. 602x10-19c), mass 1. 007amu. Outside nucleus electron: negatively charged (-1. 602x10-19c), mass = 5. 5x10-4 amu. Coulomb interaction electrostatic attraction (coulombic force) between protons and electrons. Elements atoms with different numbers of protons have different physical and chemical properties normally electrically neutral (same number of protons and neutrons)
