Answer:The small, individual helium molecules can escape through the tiny holes in the latex far more easily than the conjoined oxygen or nitrogen molecules can. ... This is why your helium balloons deflate faster than the ones you fill with air.
The total work done by the electric field on the charge is given by the scalar product between the electric force acting on the charge and the displacement of the charge: where the force is F=qE, d=0.556 and . Using the value of q and E given by the problem, we find