"<span>There was no deceiving himself: something terrible, new, and more important than anything before in his life, was taking place within him of which he alone was aware. Those about him did not understand or would not understand it, but thought everything in the world was going on as usual."
-This excerpt shows that only he alone knew that there was change going on in the place, one that is not good, & no one else seems to notice.
hope this helps</span>
Since there are 3 F atoms and only one Co atom, the mixture would be 75% Fluorine
How his house changed while he was gone, how some people were not as loyal as he thought they were