Chemistry Ch. 3
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10 terms
Terms | Definitions |
|---|---|
 Avogadro's number | the number of atoms in exactly 12 g of carbon-12, having a value of 6.022x10^23 |
| chemical formula | a symbolic representation which specifies the elements present in a compound as well as the relative or actual numbers of atoms of each element present |
| empirical formula | a type of chemical formula that shows only the simplest ratio of atoms in a compound |
| formula unit | the simplest ratio of atoms in a molecule |
| molar mass | the mass in grams of one mole of a substance |
| mole (mol) | Avogadro's number of anything; the amount of a substance containing the same number of particles as exactly 12 g of carbon-12. |
| molecular formula | the formula of actual molecules used to represent molecular compounds |
| molecular mass (molecular weight) | the sum of the atomic masses, in atomic mass units, of all the atoms in the formula of a compound |
| molecule | the smallest particle of a pure substance which possesses a unique set of properties and is capable of independent existence |
| stoichiometry | quantitative relationships (mass and mole) between substances involved in chemical changes |
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