complete and balance the following reactions. If no reaction is possible, write NR.   1. Fe + 2AgC2H3O2 ---->   2. 2Al + 3CuCl2 ---->   3. Br2 + CaI2 ---->   4. 2Al + 6HCI ---->   5. Mg + 2HCI ---->   6. Zn + H2SO4 ---->   7. Fe + CuSO4 ---->   8. Cl2 + MgI2 ---->

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