Ch 8 Vocab

Atomic mass unit (amu)

A small unit of mass equal to 1.66×10^-24 grams

Average atomic mass

the weighted average of the masses of all isotopes of an element; any sample of an element from nature can be treated as if identical to the average atomic mass of that element

mole (mol)

The number equal to the number of carbon atoms in exactly 12 grams of pure C: Avogadro’s number

represents 6.022×10²³

Avogadro’s number

The number of atoms in exactly 12 grams of pure C equal to 6.022×10²³

Conceptual problem solving

Solving problems in a flexible, creative way based on understanding the fundamental ideas of chemistry. being able to solve new problems (that you have never seen before) on your own.

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 ratio of atoms in a compound

Molecular formula

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