NOTE: Sometimes going from a/m/p to moles and density to moles you will get NAN as an answer, just reload the page to fix. Sorry about the bug I will try to fix next version.
As promised I have created version 2

. In this version I have added
Moles to Density
Density to Moles
Soon I will create Version 3.0 with:
Moles to Grams
Grams to Moles
but you will have to find the total molar mass, but it will be worth it. I will have a built in periodic table in 3.5 including built in molar masses

.
Basics of this:
---------------------
From moles to A/M/P
userinput * 6.02*10^23 = answer (a/m/p)
From A/M/P to moles
userinput / 6.02*10^23 = answer (mol)
From Moles to Density
userinput * 22.4 = answer (liters)
From Density to Moles
userinput / 22.4 = answer (mol)
---------------------
I promise this will come in help when you take chemistry other wise you will have to write out some long ass equations.
If you are taking you AP exams or any exams for chemistry this is allowed in the state of Maryland, I am unsure about other countries. Good luck taking them.
Until next time, have fun and good luck.
(+fav) and comments please