Question

Cum se calculeaza NE pt C4H6Cl2 ?

Answer 1

NE=[2+nr.at.C(val C-2)+nr.at.H(val H-2)+nr.at.Cl(val Cl-2)]/2
NE=[2+4(4-2)+6(1-2)+2(1-2)]/2=(2+8-6-2)/2=1

Answer 2

Formula generala: CaHbOcNdXe
N.E.=((2a+2)-(b-d+e))/2
tu ai C4H6Cl2, adica a=4, b=6 si e=2
N.E.=((2*4+2)-(6-0+2))/2
N.E.=1