When entering coefficients to balance equations, recall that just writing the symbol implies "1." Therefore, if a coefficient of "1" is required, choose "blank" for that box. Balance the following reaction. blank C2H4 + I2 → C2H4I2

girl imma just put my comment here because i need a couple point okurrttt

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

c. 4.54 x 10–12 j happens to be correct