Question

mere 19 ko end hogi. ​

Answer 1

$\rm\huge\underline{Answer}$

the branch of science concerned with the substances of which matter is composed, the investigation of their properties and reactions, and the use of such reactions to form new substances.

Answer 2

Answer:

CH3 - CH2 - CH2-CH3

CH3 - CH2-CH2 - CH3 have 1 methyl group

CH3- CH2- CH2 -CH3 have 1 ethyl group also

CH3 - CH2 - CH2 - CH3 have 1 n- propyl group also

Explanation:

ಥ_ಥ

〒▽〒

(˘･_･˘)