NaHCO3 is the required substance often used in antacid and is used in Soda Acid Fire Extinguisher.
In a chemical change, the atoms in the reactants rearrange themselves and bond together differently to form one or more new products with different characteristics than the reactants. When a new substance is formed, the change is called a chemical change.
Venus so that the sun rises in the west
NaCI is the answer, in what my teacher taught me.
Hope I helped :)
