Approximately days have passed when 20% of cobalt (co) remains? a) 19 b) 20 c) 21 d) 29

The answer to this is A i think.

Ch4 is nonpolar and insoluble in water. since all of the hydrogen atoms are evenly spread around the carbon atom even through the c h bond is polar all the poles cancel each other out.

The teacher is mostly talking about the distillation of a mixture