Molar Mass for Elements

You are able to read the periodic table and determine the average atomic mass for an element like carbon. The average mass is 12.01 amu. This mass is a ridiculously tiny number of grams. It is too small to handle normally. The molar mass of carbon is defined as the mass in grams that is numerically equal to the average atomic weight. This means

this is commonly written

This is the mass of carbon that contains 6.022×10²³ carbon atoms.

Avogadro's number is 6.022×10²³ particles.

This same process gives us the molar mass of any element. For example

• 1 mol neon=20.18 g neon Ne
• 1mol sodium=22.99g sodium Na