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Unit 6: Vocab Words

TermDefinition
Avogadro's number 6.02x10 23 , the number of atoms or molecules in 1 mol
molar mass the mass in grams of 1 mol of a substance
mole the SI base unit used to measure the amount of a substance whose number of atoms of carbon in exactly 12 g of carbon-12
molecule a neutral group of atoms that are held together by covalent bonds
Scientific notation a method of expressing a quantity as a number multiplied by 10 to the appropriate power
formula unit the simplest collection of atoms from which an ionic compound's formula can be written
molecular mass is an essential part of identifying an unknown compound and determining the structure of a molecule of the compound
atomic mass is a relative measure, masses of atoms expressed in grams are very small
molecular formula a chemical formula that shows the number and kinds of atoms in a molecule but not the arrangement of the atoms
density the ratio of the mass of a substance to the volume of the substance; often expressed as grams per cubic centimeter for solids and liquids and as grams per liter for gases
Formula Mass the sum of the average atomic masses of all atoms represented in the formula of any molecule, formula unit or ion
Percent composition the percentage by mass of each element in a compound
Empirical formula a chemical formula that shows the composition of a compound in terms of the relative numbers and kinds of atoms in the simplest ratio
Created by: vc451521
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