What is h3c--c--ch2--ch3?

Answer 1

butonal

Answer 2

Same as CH3, depending on reaction it may mean it's an acid since H is listed first and if weren't H3C would be highly unstable, hope that helps

Answer 3

No such compound because the 2nd C from the left has only 2 bonds, and it needs to have 4 bonds. If you mean H3C --CH2--CH2--CH3, then this compound is n-butane.

Answer 4

Ethanol

Answer 5

butonal

Answer 6

ethanol