1. Stoichiometry Page 39

2. Essential Question How can the mole ratio of a chemical equation be determined and used for conversions?

3. Mole Ratio Mole Ratio: Conversions that relates moles of substances in a reaction. We can find multiple different ratios from a single equation.

4. Ratio Practice (page 38) Write all the mole ratios for the following equations 2HgO(s) => 2Hg(l) + O 2 4NH 3 (g) + 6NO => 5N 2 (g) + 6H 2 O(l) 2Al 2 O 3 => 4Al(s) + 3O 2

5. Types of ratios Moles to moles: 2Mg + O 2 => 2MgO If 3 moles of Mg are exposed to air, how many moles of O 2 must be used to complete the reaction. What is the mole ratio? How many grams of O 2 are used?

6. Types of ratios GRAMS to moles: 2Mg + O 2 => 2MgO If 121.53g of Mg is exposed to the air, How many moles of MgO are produced? How Many grams of MgO are produced?

7. Stoichiometry Practice (38) 1) NH 3 + O 2 => N 2 + H 2 O a) 4 mol NH 3 will produce ____ moles H 2 O b) 4 mol NH 3 will produce ____ moles N 2 2) Mg + HCl => MgCl 2 + H 2 a) What mass of HCl is consumed by the reaction if 2.5 moles of magnesium? b) What mass of H 2 is produced?

8. Stoichiometry Practice (38) 3) CaC 2 + H 2 O => C 2 H 2 + Ca(OH) a) If 32.0 grams of CaC 2 are consumed how many moles of H 2 O are needed? b) How many grams of C 2 H 2 are produced? 4) If 75 grams of sodium chlorate reacts with silver nitrate, what is the mass of both products?