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17 Cards in this Set
- Front
- Back
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stoichiometry
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the quantitive derivation of information from chemical symbols, formulas, and equations
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amu
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atomic mass unit -- 1/12 of the mass of a carbon-12 atom
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Avogadro's number
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the number of atoms in 12.00g of carbon-12 (6.02 x 10^23)
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mole
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an Avogadro's number of particles
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molecular weight (mass)
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the sum of the atomic weights of the atoms in the chemical formula
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molarity
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the number of moles of solute dissolved in one liter of solution (mol/L or M)
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STP
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Standard Temperature and Pressure - 0 C -- 273K -- 1 atm (atmosphere) -- 14.7 (pounds/in^2) -- 29.92 in Hg
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empirical formula
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the simplest whole number ratio of different atoms that make up a compound
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molecular formula
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the actual number of atoms of each element in a compound
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crystal
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a solid that possesses an orderly, internal, repeating pattern of the atoms, ions, or molecules that make it up
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amorphous solid
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a solid in which the molecules that make it up are arranged in a random fashion
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hydrate
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a crystalline form of a compound which has H2O molecules incorporated in its structure
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anhydrous
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a compound that is left after all the H2O is driven off
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hygroscopic
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substances that absorb moisture from the air to form a hydrate
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efflorescent
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substances that are hydrates which tend to loose their H2O to the air
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deliquescent
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substances that absorb so much moisture from the air that they dissolve in the H2O forming a solution
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deliquescent
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substances that absorb so much moisture from the air that they dissolve in the H2O forming a solution
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