A) Fe(s) + Cl²(g)=> FeCl³ b) Na²CrO⁴(ac) + CaS(ac)=> CaCrO⁴=> +Na²S(ac)
c) C²H⁶ + O²=> Co² + H²O
d) Cl² + H²S=> HCl + S

a:

by the combination of an unlimited number of elements

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8

(b) which contains higher levels of vitamin b, oranges or spinach?

explanation:

you can eliminate a, c, and d because they are questions based on opinions.