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 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 elements box. The atomic mass of an element can be found usually in the upper right hand corner of that elements box. Example: Potassiums atomic mass is 39.10g/mol Aluminums atomic mass is 26.98g/mol

3. Examples of Atomic Mass (Single) Oxygen (O) Oxygen (O) Sodium (Na) 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 masss of all the elements. The atomic mass of combined elements can be found by adding together the atomic masss of all the elements. Example: H 2 O = 18 g/mol Example: H 2 O = 18 g/mol NaCl = 58.44 g/mol

5. Examples of Atomic Mass (Combined) H 2 O H 2 O (H 2 = 1+1; O= 16: 1+1+16) NaCl NaCl (Na= 23; Cl= 35.5: 23+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) 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)] 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 You now have converted grams to moles

7. Examples of Converting Grams to Moles 100 g Al * 1 m Al 100 g Al * 1 m Al 26.9 g Al = 3.72 m Al 26.9 g Al = 3.72 m Al 200 g H 2 O * 1 m H 2 O 200 g H 2 O * 1 m H 2 O 18.0 g H 2 O = 11.0 m H 2 O 18.0 g H 2 O = 11.0 m H 2 O

8. How You Convert When converting moles to grams, you take the given number of moles of the element(s) 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] 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! You have now converted moles to grams!

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

10. Quiz Time! How many moles are in 26 grams of N 2 O? How many moles are in 26 grams of N 2 O? If there are.5400 moles of FeSO 4, how many grams are there? If there are.5400 moles of FeSO 4, how many grams are there? Answer! Answer!

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

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