Matter and Change. Chapter 3. Diatomic. Two atoms of the same element bonded together. Phase. A sample of matter that looks the same. Substance . A form of matter that has a uniform and unchanging composition…aka a pure substance. The 3 Physical States of Matter. Solid Liquid Gas.
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gas: Air nitrous oxide(dentist)
liquid: salt water 7-up
solid: gold ring, metal alloys
For example: Dry ice
(you leave your bike out in the fog and it rusts)
mass of element x 100
Mass of compound
1. Mass of element in a compound = ratio
Mass of other element in compound
2. Mass ratio compound I = small whole #
Mass ratio compound II
*find the mass ratio for each compound, then divide the two ratios to give a small whole # ratio
Example: Analysis Data of Two Iron CompoundsAre Compounds I and II the same compound?If not, use the law of multiple proportions to show the relationship between them.