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7 Cards in this Set
- Front
- Back
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Law of Conservation of Mass |
Matter can neither be created nor destroyed. Antoine Lavoisier |
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Law of Definite Proportions |
A given compound always contains exactly the same proportion of elements by mass. Joseph Proust |
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Law of Multiple Proportions |
If two elements can combine to form one compound, the masses of one element that combine with a fixed mass of the other element are in the ratio of small whole numbers. John Dalton |
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Law of Gaseous Volumes |
When gases combine or are produced in a chemical reaction, they do so in a simple ratio by volume provided all gases are at the same temperature and pressure. Gay Lussac |
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Avagadro Law |
Equal volumes of gases at same temperature and pressure should contain equal number of molecules. Amedeo Avagadro |
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Atomic Theory |
1. All matter consists of indivisible atoms. 2. All atoms of a given element have identical properties including weight. Atoms of different elements have different mass. 3. Compounds are formed when atoms of different elements combine in a fixed ratio. 4. Atoms are neither created nor destroyed, only rearranged in a chemical reaction.
John Dalton |
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% composition, Empirical formula |
% composition (mass of element/molar mass of compound) * 100 Molecular formula (% composition/mass of element) = empirical formula Empirical formula * (molar mass of compound/empirical mass) |
