Which choice has prokaryotic cells? human blood

onion root

cow's liver

E. coli

C. chemical changeshope i : )

Nonmetal are moldable and easily shaped

(no3)⁻n has oxidation number x,o has oxidation number -2.(x*1 -2*3) charge of the nitrate ion, and we know that charge of the nitrate ion =-1.so,(x*1 -2*3) =-1x-6=-1x=+5answer a. +5.