Answer:
A medium.
<h3>Explanation:</h3>
It's the material the wave is travelling through.
THE CORRDCT ANSWER IS TRUE
Answer:
C
Explanation:
Since the solution have an observable color, that means that it absorbs light in the visible region hence it can be determined by colorimetry. Secondly, KMnO4 is a reducing agent which can be titrated against an oxidizing agent and it's concentration accurately determined.
