Objectives. To understand and illustrate the Law of Constant Composition To learn about Dalton’s theory of atoms To learn how a formula describes a compound’s composition. Dalton Intro. A given compound always contains the same proportion by mass of the elements of which it is composed.
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Law of Constant Composition (1799 Joseph Louis Proust)
You have 90 seconds to memorize these 5 parts of the theory!!
Put your notes away and write a set of rules for how to write a formula of a compound. Be as complete as you can be using what you have learned throughout your course
Aspirin, acetylsalicylic acid, C9H8O4
Aspirin in Motion