CHM 1311 Chapter Notes - Chapter 1.1-1.4 & 21.1: Molar Mass
10 Sep 2016
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Document Summary
Macroscopic physical/chemical properties can be observed with the eye while microscopic properties of a chemical structure must be magni ed. Atoms are the fundamental unit of a chemical structure (greek: atomos). A chemical compound is a substance that contains 1/+ elements, these can be written as chemical formulas & elemental symbols. Physical properties include the length, area, mass & volume measure of an object. Temperature is a property of matter that determines the direction of heat ow. Quantitative measurements of properties (3) numerical magnitude, unit & precision. Mole (n) = m m (mass of the sample molar mass of substance. Mole (n) = # m (atoms avogadro"s number) Nuclei are composed of protons & neutrons; they are also called nucleons. Protons have a charge of +1. 602 x 10^-19 c & mass of 1. 672622 x 10^-27 kg. Neutrons: has the same mass but is electrically neutral.
