# If the atomic weight of nitrogen is 14.01, what is the mass of the nitrogen atoms in one mole of cadmium nitrate, Cd(NO_3)_2?

(work out the brackets, as in maths, and it'll be $C {\mathrm{dN}}_{2} {O}_{6}$)
The mass the nitrogen is thus $2 \times 14.01 = 28.02 g$