CHM 103 Lecture Notes - Lecture 1: Boiling Point
20 Sep 2016
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Document Summary
Matter anything that has mass and takes up space. Elements pure substance, cannot be chemically separated into a simpler substance. Compounds 2 or more different elements bonded together. Molecule atoms bonded together in discreet units. Non-molecular substances bonded, but not in discreet units (materials-plastic, metal, fabric, etc. ) Homogeneous uniform (ex. salt dissolved in water) Physical measurable, without change in identity (ex. boiling point) Chemical identity changes, reaction occurs (h + o are elemental molecules because they each have 2 atoms) Intensive independent of sample size (ex. grams per liter) Hydrogen reacts with the oxygen blows up. Method of organizing calculations/conversions by keeping track of units. The world record for the 100m dash is 9. 58s. What is the average speed in mi/hr? (1 mile = 1. 61 km) (100 m) (1 km) (1 mi) (60 s) (60 min) = 23. 3 mi/hr (9. 58 s) (1000 m) (1. 61 km) (1 min) (1 hr)
