$2.16$ g of copper metal when treated with nitric acid following by ignition of the nitrate gave$2.70$ g of copper oxide. In another experiment $1.15$ g of copper oxide upon reduction with hydrogen gave $0.92$ g of copper. Show that the above data illustrate the law of Definite proportions.

Silver chloride is prepared by dissolving $0.5 \mathrm{g}$ of silver wire in nitric acid and adding excess of hydrochloric acid to silver nitrate formed. The silver chloride precipitated is separated, washed and dried. The weight of silver chloride is $0.66 \mathrm{g}$. Find the mass percentage of the constituents.

Heating $1 \mathrm{g}$ of silver metal in a current of dry chlorine gas till the metal is completely converted into its chloride precipitated is separated, washed and dried. The weight of silver chloride is $1.32 \mathrm{g}$. Illustrate the law of constant composition by the above data.

Two oxides of lead were reduced to metallic lead by heating in a current of hydrogen and the following data obtained:

Mass of yellow oxide taken is $3.45 \mathrm{g}$, loss in mass during reduction is $0.24 \mathrm{g}$.

Mass of brown oxide taken is $1.227 \mathrm{g}$, loss in mass during reduction is $0.16 \mathrm{g}$.

Show that the above data illustrate the law of Multiple Proportions.

Two oxides of nitrogen contain the following percentage compositions:
(i) Oxide A contains $63.64\%$ nitrogen and $36.36\%$ oxygen.
(ii) Oxide B contains $46.67\%$ nitrogen and $53.33\%$  nitrogen

Establish the Law of Multiple Proportions.