Mole Conversions

Refer to the mole map:

Particles ----> Moles

Ex.  How many moles of hydrogen molecules (H₂) are present in 9 x 10²³ molecules of hydrogen?

                                                                                  1 mole

9.0 x 10²³ molecules of hydrogen X  --------------------------------  =  1.5 moles

                                                                     6.022x10²³ molecules

*** Round to the correct significant figure!

Moles ---> Particles/Molecules/Formula units/atoms

Ex.  How many molecules are contained in 3 moles of water molecules, H₂O?

                           6.022x10²³ molecules

3.0 moles X  --------------------------------  =  1.8x10²⁴ molecules

                                       1 mole 

Moles ---> Grams

Ex.  Determine the mass in grams of 3.60 mole of H₂SO₄.

1. Find the molar mass of H₂SO₄.

H --> 1.0(2) =      2

S --> 32.1   =     32.1 +

O --> 16.0(4)=   64

                       ---------

                        98.1 g

     2.  Solve.

                           98.1 g

3.60 moles X  ------------  =  353g of H₂SO₄

                           1 mole 

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

Grams ---> Moles

Ex.  How many moles of methane molecules, CH₄, are in 80 grams of methane?

C --> 12.0 =     12

H --> 1.0(4) =   4 +

                       ------

                        16 g

             

                 1 mole

80g X  ------------  =  5.0 moles

                  16g 

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

By: Hikari Hoshika