November 19th -Nick kim

Mole conversion  

A

-converting atoms,particles,molecules,and formula units into moles(6.022x 10²³)

#  6.022x 10²³ particles,atoms,molecules,and formula units = 1 mole

Ex 4.56x 10⁴³ baron particles into moles

4.56x 10⁴³ particles x 1mole/6.022x 10²³ particles

4.56x 10⁴³/6.022x 10²³ =0.757x 10

                                                  = 7.57x 10²¹

B

-converting moles into grams                                

# In each elements in periodic table, they all have atomic mass

Eg. Fluorine=19.0 Chlorine=35.5 .........
units are g/mol, it means there are 6.022x 10²³ (mol) atoms for one element and they are measure in gram. Therefore, Fluorine has mass of 19.0g/mol 

Ex, 4.01 moles sillicon(28.1g/mol) into grams
4.01moles x 28.1g/mole
4.01 x 28.1=113 g

here is website that will help

http://www.youtube.com/watch?v=ehepBBtSbDc

http://www.youtube.com/watch?v=NMdN1LtHuDA