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28 Cards in this Set
- Front
- Back
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Molar Mass |
mass of one mole of a substance |
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Formula Mass |
mass of a molecule or compound in amu |
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Mole |
a counting unit equal to 602 billion trillion |
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Avogadro's Number |
602 billion trillion (another name for the mole) |
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Physical change |
change to size, shape or state of matter |
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Chemical change |
breaking chemical bonds so that atoms rearrange to form new bonds |
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Combustion Reaction |
burning in oxygen |
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example of combustion reaction |
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decomposition reaction |
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Decomposition reaction |
when a compound splits apart |
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double displacement (replacement) reaction |
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Double Replacement Reaction (Displacement) |
when two compounds split apart and recombine; two components rearrange |
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Single Replacement Reaction (Displacement) |
when one compound splits apart and bonds with a different element; one component rearranges |
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single replacement (displacement) reaction |
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Synthesis Reaction |
where two things combine to create a compound |
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synthesis reaction |
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Chemical Equation |
an equation that explains the types and amounts of elements, molecules or compounds involved in a chemical reaction |
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Law of Conservation of Mass |
mass is neither created nor destroyed during a chemical reaction |
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Endothermic Reaction |
when compounds take in energy to create bonds to form new products; temperature can drop during reaction Examples: Photosynthesis, baking, chemical "ice" packs |
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Exothermic Reaction |
when compounds release energy to form their products; produce light or heat during the reaction |
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Reactants |
chemicals before the chemical reaction |
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Products |
chemicals that result from a chemical reaction |
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Chemical Formula |
describes how many atoms and what types are involved in a chemical bond |
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Why Bonds Form |
atoms fill their valence shells during a bond (to get stable) |
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Why Chemical Reactions Occur |
some type of energy breaks chemical bonds |
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Coefficient |
number that describes how many moles (molecules) of a compound/molecule are involved in a reaction |
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Chemical Formula |
H2O |
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2 H2O |
