2C+2H2=C2H4 square Au+Au __ square 2Ca+O2=2CaO __ square 4Al+3O2=2Al2O3 __ square 2H_(2)+O_(2)=2H2O __ square Cl+Cl=Cl2 __ square square H_(2)+Cl2=2HCl2 __ square 2Na+Cl2=2NaCl __ square 3H2+2N=2NH3 __ square

Let's go through each chemical equation and balance them correctly:1. - This equation is not balanced correctly. The correct balanced equation should be: - 2. - This equation is incomplete. The correct balanced equation should be: - 3. - This equation is balanced correctly. - 4. - This equation is balanced correctly. - 5. - This equation is balanced correctly. - 6. - This equation is balanced correctly. - 7. - This equation is balanced correctly. - 8. - This equation is balanced correctly. - 9. - This equation is balanced correctly. - So, the balanced equations are:1. 2. 3. 4. 5. 6. 7. 8. 9.