45 is the atomic mass of the atom. And the name is Scandium
Answer:
See below
Explanation:
Each metal oxide reacts with HCl to form water and the metal chloride

The minerals in hard water react with soap and affect its cleaning capacity. It's still possible to use hard water when washing by using more soap. The additional soap will no longer be affected by the minerals in the water, so they can clean just as effectively, but you'll be wasting more soap this way.