Search

Avogadro Resources

Lessons

Moles and Percents Why do we need Moles? A chemical mole, or mol, is a unit of measure, just like a gram or an ounce. It is used internationally so that all chemists speak the same measurement language. The mole was invented because, well, it made sense. Scientists were having a hard time converting between atoms of an element and grams of an element (grams were the previous standard of... read more