CHE 2A Chapter 2: chem ch 2
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CHE 2A Full Course Notes
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An individual atom cannot be considered a solid, liquid, or gas. Law of conservation of mass: matter is neither created nor destroyed. Lavoisier, who also discovered that combustion involves reaction w/ oxygen. Eg: when 3g of carbon reacts with 8g oxygen, 11g of carbon dioxide is produced. Law of definite proportion : a given compound always contains exactly the same proportion of elements by mass. Eg: c:o mass ration of a particular compound is the same, regardless of the size or source of the sample. Law of multiple proportions: when 2 elements form a series of compounds, ratio of the masses of second element that combine w/ 1 gram of the first can always be reduced to small whole numbers. Eg: burning 10 g of propane produces twice as much carbon dioxide as burning 5 g of propane. C:o mass ratio of one compound is exactly double that of another compound.
