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9 Cards in this Set
- Front
- Back
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Moles |
-a chemical counting/conversion unit for atoms -1 mole = 6.022x1023 particles |
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Avagadro's Number |
-6.022x1023 particles -used for finding out how many atoms are in a mole |
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Conversion Factors |
-particles--> moles particles / Avagadro's Number -moles--> particles moles x Avagadro's Number |
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Molar Mass |
-the mass of a mole of a substance -add all atomic masses together -unit--> grams/moles--> g/mol |
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Calculations with Molar Mass |
-grams-->moles grams / molar mass -moles-->grams moles x molar mass |
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Units |
moles--> mole (mol) molar mass--> grams/moles (g/mol) mass--> grams (g) percent composition--> percent (%) |
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Percent Composition |
-the percent by mass of any individual element or molecule Steps -mass of substance -mass of element/substance -divide them -multiply by 100 [molar mass (element) / molar mass (compound)] x 100 |
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Molecular Formula |
-a chemical formula with the actual number of elements in the compound (not reduced) |
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Empirical Formula |
-a chemical formula with reduced numbers of elements (reduced) |
