$5-12.$ Calculate the $\frac{g}{L}$ of the following:

a$.0\mathrm{.}0500N{H}_{2}C{O}_3$

b$.0\mathrm{.}0010MCHC{l}_3$

c$.0\mathrm{.}0300$NCa$(OH{)}_2$

d$.0\mathrm{.}0080MC{O}_3^{2-}$