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13 Cards in this Set
- Front
- Back
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decomposition reaction
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A reaction that changes a compound into its constituent elements
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formation reaction
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A reaction that starts with two or more elements and produces one compound
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complete combustion reaction
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A reaction in which O2 is added to a compound containing carbon and hydrogen, producing CO^2 and H^2O
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incomplete combustion
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When a substance containing carbon and hydrogen burns in an environment where there is limited oxygen, one of two chemical reactions occurs. In these reactions, carbon dioxide is not produced. Instead, either carbon monoxide or just plain carbon is produced.
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catalytic converters
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Helps reduce the amount of carbon monoxide in automobile exhaust by converting the carbon monoxide into carbon dioxide.
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atomic number
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The number that appears above the atomic symbol tells you the place where the atom appears on the periodic table chart. If you start at the top left of the chart and work your way across, you will see that the number in each box is one higher than the number in the box before it.
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atomic mass
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The number that appears below the atomic symbol which tells us how heavy the atom is. The bigger the number, the heavier the atom.
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atomic mass units
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Abbreviated as amu. As you might expect, this unit is very, very small. After all, atoms are so small that you cannot see them. They obviously cannot have too much mass, since they are so small. It turns out that the relationship between these units and grams is as follows:
1.00 amu = 1.66 x 10 {-24} g IMPORTANT: {-24} is a superscript. (I can't seem to write those on here... just like subscripts. So just remember that for the future. A number enclosed in { } is superscript. |
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Law of Mass Conservation
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The mass of the atoms before they join together should be the same as the mass of the atoms after they join together.
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molecular mass
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If you just add up all the masses of all of the atoms in a molecule, you'll end up with the mass of that molecule.
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mole
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Refers to a specific number of atoms. It is a word that simply means “6.02 x 10{23} ”. It is a much easier way to report how many atoms or molecules exist in a sample.
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Avogadro's number
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6.02 x 10{23}
This number represents how many atoms are in a sample of an element when that sample has the same mass in grams as the element's mass in amu. |
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stoichiometry
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The subject of relating the quantities of chemical substances in a chemical reaction.
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