1. Converting Grams To Moles and Moles To Grams
By Rochelle Berk
and Shelly Huff

2. Atomic Mass (Single Element)
The atomic mass of a single element can be found on the periodic table of elements
The atomic mass of an element can be found usually in the upper right hand corner of that element’s box.
Example: Potassium’s atomic mass is 39.10g/mol
Aluminum’s atomic mass is 26.98g/mol

3. Examples of Atomic Mass (Single)
Oxygen (O)
Sodium (Na)
= 16 grams/mole
= 22.9 grams/ mole

4. Atomic Mass (Combined Elements)
The atomic mass of combined elements can be found by adding together the atomic mass’s of all the elements.
Example: H2O = 18 g/mol
NaCl = g/mol

5. Examples of Atomic Mass (Combined)
H2O
(H2= 1+1; O= 16: )
NaCl
(Na= 23; Cl= 35.5: )
= 18 grams/mole
= 58.5 grams/mole

6. How You Convert
When converting from grams to moles, first take the given number of grams of that element(s)
Next, multiple it by [1 mole of your element divided by the atomic mass of your element (grams)]
You now have converted grams to moles

7. Examples of Converting Grams to Moles
100 g Al * 1 m Al
26.9 g Al = 3.72 m Al
200 g H2O * 1 m H2O
18.0 g H2O = 11.0 m H2O

8. How You Convert
When converting moles to grams, you take the given number of moles of the element(s)
Next, you multiply that number by [the atomic mass of the element(s) divided by one mole of the element]
You have now converted moles to grams!

9. Examples of Converting Moles to Grams
.0500 m Cu * 63.5 g Cu
1 m Cu = 3.00 g Cu
.090 m NaCl * 58 g NaCl
1 m NaCl = 5.0 g NaCl

10. Quiz Time! How many moles are in 26 grams of N2O?
If there are moles of FeSO4, how many grams are there?
Answer!
Answer!

11. 1.) 0.590 moles Of N2O 2.) 82.08 grams of FeSO4 Answers! Back to Quiz

12. Good Job!
Now that you know how to convert both moles to grams and grams to moles, go have fun and learn, learn, learn!