For this reaction: 6 PbO+O2 → 2 Pb 0. How many moles of Pb;0, are produced from 1.25 moles of oxygen?

the answer is 303.15 or 303

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.