During diffusion molecules move down their concentration gradient, which means a molecules move from an area of concentration to an area .

during diffusion moleclues move from areas of high concentration to areas of low concentration. Diffusion does not require enery to move molecules.

weight of any object is given by

w = m*g

where m is mass of the object and g is the acceleration due to gravity.

for earth the value of g is 9.8 m/s^2 so

w=117.6 n m=12 g=?

117.6=12g => g=9.8 m/s^2

which is the force of gravity on earth.