1. Reaction-Stoichiometry Problems

2.  Given and unknown quantities are amount in moles. ◦ Amount of given substance in moles  amount of unknown substance in moles

3.  Given is the amount in moles and the unknown is the amount that is expressed in grams ◦ Amount of given substance (in moles)  amount of unknown substance (in moles)  mass of unknown substance (in grams)

4. ◦ Given is a mass in grams and the unknown is an amount in moles  Mass of given substance (in grams)  amount of given substance (in moles)  amount of unknown substance (in moles)

5.  Given is a mass in grams and the unknown is a mass in grams ◦ Mass of given substance ( in grams)  amount of given substance (in moles)  amount of unknown substance ( in moles)  mass of unknown substance (in grams)

6.  A mole ratio is a conversion factor that relates the amount of any two substance involved in a chemical reaction. ◦ Ex., 2Al 2 O 3  4Al + 3O 2