Mole Conversions

Particle/Atom/Formula Unit ---> Moles

ex. How many moles of Ag are present in 3.0 x 10¹⁶ atoms of Silver?
3.01 x 10²⁴ Ag atoms x         1 mol Ag               
                                     6.022x10²³ Ag atoms
= 5.0 x 10^-8 mol Ag

Moles ---> Particles/Atoms/Formula Units
ex. How many atoms are present in 2 moles of Potassium?
2 mol K x 6.022 x 10²³ atoms K
                        1 mol K
=1x10²⁴ mol K

Moles ---> Grams
ex. What is the mass in grams of 3.5 moles of Sulfur?
3.5 mol S x 32.1 g S
                   1 mol S
= 110 g S

Grams ---> Moles
ex. How many moles are there in 2.49 grams of Tin?
2.49 g Sn x   1 mol Sn   
                   118.7 g Sn
= 0.0210 mol Sn