Moles ↔ Atoms / Molecules

[ MOLES ] → [ MOLECULES ] → [ ATOMS ]
       Avogadro's Number       Subscripts

Example:
• How many water molecules are there in 0.65 mol?
0.65mol x 6.02x10^23molec / 1 mol = 3.9 x 10^23molec

•How many hydrogen atoms are there? How many oxygen atoms?
3.9x10^23molec x 2 atoms / 1 molec = 7.8 x 10^23atoms }Hydrogen

3.9x10^23molec x 1 atoms / 1 molec = 3.9 x 10^23atoms } Oxygen

- Paulo Santillan 

Mole Conversions Chart

[DENSITY]
         ↑                                                                                                                    
         ↑                                                                                                             
         ↨                                                                                                           
         ↓                                                                                                               
         ↓   Molar Mass                 Molar Volume                                        
[MASS] ← ← ↔ → → [MOLES] ← ← ↔ → → [VOLUME (@STP)]
                                              ↑
                                              ↑
                                              ↨   Avogadro's Number
                                              ↓  
                                              ↓
                                   [MOLECULES]
                                              ↑
                                              ↑
                                              ↨   Subscripts            
                                              ↓
                                              ↓
                                       [ATOMS]

-Paulo Santillan

Mole Ratio Lab (November 30, 2011)

In this lab, we were to determine the ratio btwn. the moles of iron → moles of copper. (Copper II Chloride)

1) Weigh both nails and filter paper
2) Collect copper (II) chloride w/ scoopula
3) Place the 8g of weighed copper (II) chloride on top of filter paper
4) Add 8g of copper (II) chloride to beaker, then fill w/ 50mL of water
5) Stir the copper (II) chloride & water
6) Determine the mass of nails
7) Place the 2 nails into the solution for 10 mins
8) Place funnel in clamp
9) Fold filter paper into 4 divisions & put in funnel in the shape of a cone
10) Use the tongs to pick up the 2 nails from the beaker & scoop the copper (II) chloride off the nails into the solution
11)Put stirring rod in center of funnel & pour solution into funnel
12) After all the solution is in the beaker, pick the filter paper w/ the tongs
13) Place filter paper in oven for about 30 mins
14) Take paper & weigh on scale
15) Clean up everything

-Paulo Santillan

Molar Volume Lab (November 22, 2011)

In this lab we followed the steps to determine the molar volume of a gas (Butane = C4H10)

1) Fill the sink about 3/4 w/ water
2) Weigh your butane lighter on the scale
3) Place the graduated cylinder in water (base facing upwards)
4) Fill the whole graduated cylinder w/ water
5) Hold the butane lighter under the cylinder (water)
6) Click the butane lighter to release butane in cylinder
7) Make a measurement of the amount of butane filling the test tube
8) Dry the butane lighter in oven for about 10-15 min
9) Weigh the butane lighter again
10) Make calculations
11) Clean up

-Paulo Santillan