Answer: hydroxide ions
Explanation:
According to the Arrhenius concept, an acid is a substance that ionizes in the water to give hydronium ion or hydrogen ion and a bases is a substance that ionizes in the water to give hydroxide ion .
According to the Bronsted Lowry conjugate acid-base theory, an acid is defined as a substance which donates protons and a base is defined as a substance which accepts protons.
According to the Lewis concept, an acid is defined as a substance that accepts electron pairs and base is defined as a substance which donates electron pairs.
As KOH can give hydroxide ions on dissociation , it is considered as arrhenius base.

Answer:
Hey!
Your answer is Calcium Phosphate!
Explanation:
It is the substance/mineral that is mostly found in our teeth and bones!
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The concentration of a substance is the quantity of solute present in a given quantity of solution.
This statement would be best characterized by the law of conservation of momentum—choice C.