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Chemistry Chapter 3
General Chemistry
| Question | Answer |
|---|---|
| quantitative | amount |
| molecular mass | sum of the masses of the atoms represented in a molecular formula (mass of a molecule in u) |
| formula mass | for ionic compounds where the sum of the masses of the atoms or ions present in a formula unit |
| mole (mol) | amount of substance that contains as many elementary entities as there are # of atoms in exactly 12g of the carbon-12 isotope |
| avogadro's number | 6.022 x 10^23 |
| molar mass | is the mass of one mole of a substance. Molar mass is numerically equal to atomic mass, molecular m ass, or formula mass however, the untis of molar mass are grams (g/mol) |
| mass percent composition | a compound refers to the proportion of the constituent elements, expressed as the number of grams of each element per 100 grams of the compound. |
| whole-number ratio | find the whole number ratio by dividing each number of moles by the smallest number of moles |
| molecular formula | is a simple integer multiple of the empirical formula. Molecular formula mass/empirical formula mass= integer (nearly) |
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