Answer:
rows
Explanation: periods are ROWS that run from left to right.
C chemical really get rid of them
the answer is temperature
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.