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Notes5 Material Type: Notes; Professor: Kidwell; Class: GENERAL CHEMISTRY I; Subject: Chemistry; University: Harper College; Term: Spring 2015;
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These laws come from careful observations based in the best possible accuracy in the scientists measurement for the time they were performed. There is still a significant amount of serendipity involved!
mass is neither created nor destroyed. ( Lavoisier ~ 1780’s, first modern textbook on chemistry, Elementary treatise On Chemistry , 1789 )
contains exactly the same proportion of elements by mass. ( Proust ~ early 1800’s)
a series of compounds, the ratios of the masses of the second element that combine with one gram of the first element can always be reduced to small whole numbers. ( Dalton ~ early 1800’s)