Question

If dipole moment of is $1.5D$, dipole moment of is:

Answer 1

$u_1,u_2,u_3,u_4$ are four vectors

$=\sqrt{{\left(1.5\right)}^2+{\left(1.5\right)}^2}=\sqrt{+(2\times 1.5\times 1.5)\cos {120}^o}$

$=\sqrt{4.5-2.25}=\sqrt{2.25}=1.5D$