C - electric charges have electric fields. imagine a magnet - charge is distributed in space in the same way magnetic field is. if you can imagine how two magnets of the same sign (++/--) repel each other, you can apply that concept to electric charge/field.
Moles of NaCl
Molality
i is vant Hoff factor
For NaCl vant Hoff factor is 2( Actually 1.9)
A Polar Covalent Bond!! Hope this helps!!
Physical: color red or green behavioral:grows