1. Practice Write a balanced formula equation for: aluminum + oxygen  aluminum oxide Al +Al OO2 →O2 →Al 2 O 3 4 23

2. Practice Write a balanced formula equation for: Magnesium hydroxide + phosphoric acid  Magnesium phosphate + water Mg(OH) 2 + H 3 PO 4 → Mg 3 (PO 4 ) 2 + H 2 O H(OH) 3 2 6

3. Practice Write a balanced formula equation for: Aluminum reacts with sulfuric acid to produce hydrogen and aluminum sulfate. Al +H 2 SO 4 →H 2 + Al 2 (SO 4 ) 3 33 2

4. Practice Write a balanced formula equation for: Pentane, C 5 H 12, combusts with oxygen to produce carbon dioxide and water vapor. C 5 H 12 + O2 →O2 → CO 2 + H2OH2O6 5 8