Question

Calculate the molecular weight of the following substances:
(a)Lead Nitrate$\mathrm{Pb}{\left({\mathrm{NO}}_3\right)}_2$

Answer 1

The molecule of lead Nitrate$\mathrm{Pb}{\left({\mathrm{NO}}_3\right)}_2$ contains one lead atom(atomic weight=207 amu), two nitrogen atoms(Atomic weight=14 amu), and six oxygen atoms(Atomic weight=16amu).

The molecular weight of the lead Nitrate$\mathrm{Pb}{\left({\mathrm{NO}}_3\right)}_2$ will be$207+(2\times 14)+(6\times 16)=331\mathrm{amu}.$