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Answer:
A soft metal, it's solid. Chlorine and oxygen are both gases at room temperature. What are some characteristic properties of chlorine that distinguish it from oxygen? It dissolves in water.
A's order is 1 . Bs order is 1. Overall rxn order is 2
The oxidation number of oxgyen is -2. In the compound, the total charge of oxygen is -12. Fe has a charge of +2. To make the sum equal to zero, N has to have a charge of +5. -12+2+2x=0; x= +5.