chem ch 8 vocab

atomic mass unit (amu)

a small unit of mass equivalent to 1.66 × 10^-24 grams

average atomic mass

the weighted average mass of the atoms in naturally occurring sample of the element

avogadro’s number

the number equal to the number of carbon atoms in exactly 12 grams of pure 12C, equal to 6.022 × 10^23

conceptual problem solving

solving problems in a flexible and creative way based on the fundamental ideas of chemistry

molar mass

the mass in grams of 1 mole of a compound

mass percent

the percent by mass of a component of a mixture or of a given element in a compound

empirical formula

the simplest whole-number ration of atoms in a compound

molecular formula

the exact formula of a molecule, giving the types of atoms and the number of each type

mole (mol)

The number equal to the number of carbon atoms in exactly 12 grams of pure 12C : Avogadro’s number. One mole represents 6.022 × 10^23 units