D) The same number of each type of atom will always be present before and after a chemical reaction takes place.
Mass is never created or lost in a chemical reaction, so the atoms of each element must stay balanced.
Answer: Sulfur dioxide and nitrogen oxides dissolve very easily in water and can be carried very far by the wind. These pollutants cause acid rain.
The cation that is likely to be found in place of Fe(ii) in the square planar binding domain of hemoglobin is the Cobalt ions (Co2+)
Cobalt ion is closely related to Iron (ii) ions as a transition metal and can support a square planar coordination environment.
