# What is the relationship between 1) A.M.U and gram, 2) Mole and gram, 3) Mole and A.M.U?

AMU, or Atomic Mass Unit, is a way of bridging the gap between grams and something so small we cant even see.
Lets take Carbon, ##C##, for example. If you look on the periodic table, Carbon has the atomic mass of 12.
That means that one carbon atom weighs 12 AMU.
To make it simple, 1 Mole of Carbon is just 12 grams of it. A mole is the amount of atoms in exactly 12 grams of Carbon.
Remember, Carbon’s atomic mass, or AMU, is 12.
If you want to get technical, 1 Mole equals ##6.022×10^23## atoms of that particular substance.
That means that in 1 Mole of Carbon, or 12 grams of carbon, there are 602,200,000,000,000,000,000,000 atoms of Carbon (##6.022×10^23##)
So if you have 1 Mole of Nitrogen, that means that you have 14 grams of Nitrogen.
If you have 4 Moles of Sulfur, you have 128 grams of Sulfur.
Now, lets do it the other way.
If you have 500 grams of Phosphorous, you have…
##500/31=16.13## Moles of Phosphorous
If you have 8,473 grams of Lead, you have…..
##8473/207=40.93## Moles of Lead

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