What observations by Rutherford led to the hypothesis that atoms are mostly empty space, and that almost all of the mass of
the atom is contained in an atomic nucleus?

pv=nrt

explanation:

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.