Atomic, molecular and formula masses

Atomic weight?
So what is the unit for atomic mass?
An analogy for atomic mass
- An "atomic weight" experiment
- Avogadro's Hypothesis
The Relative Masses of Gases - a demonstration experiment
So then, why isn't the atomic mass of Hydrogen exactly 1?
- Isotopes
- Who picked hydrogen, anyway?
What, you say? Not a molecule?
Calculating formula masses
Of Moles and other furry creatures
How many is that? Does it matter? It's enough!
- Where'd they get that number?
Summary - Molar Mass
Take the Quiz - the quiz opens up in a separate window so you can continue to work in this section to locate the answers if necessary

Sprinkled throughout this tutorial, you'll find colored sections like this. These are sample questions to help guide you in your understanding of the concepts. No mark is recorded when you do these questions, so try them to see how good your knowledge is.