What is the oxidation number of silver in $\left[\mathrm{Ag}{\left({\mathrm{NH}}_3\right)}_2\right]\mathrm{Cl}$?

Write the ion-electron equation for the following equation

$\mathrm{Cu}+{\mathrm{H}}_2{\mathrm{SO}}_4 \to {\mathrm{CuSO}}_4+{\mathrm{SO}}_2+2{\mathrm{H}}_2\mathrm{O}$

Balance the following equation by ion electron method :

${\mathrm{MnO}}_4^{-}+{\mathrm{C}}_2{\mathrm{O}}_4^{2-}+{\mathrm{H}}^{+} \to {\mathrm{Mn}}^{2+}+{\mathrm{CO}}_2+{\mathrm{H}}_2\mathrm{O}$

Balance the following equation : 

${\mathrm{Cr}}_2{\mathrm{O}}_7^{2-}+{\mathrm{H}}^{+}+ \mathrm{\_\_\_\_\_} \to {\mathrm{Cr}}^{3+}+{\mathrm{H}}_2\mathrm{O}$

Balance the following equation : 

${\mathrm{Cr}}_2{\mathrm{O}}_7^{2-}+{\mathrm{NO}}_2^{-} \_\_\_\_ \to {\mathrm{Cr}}^{3+}+{\mathrm{NO}}_3^{-}$

Calculate the normality of the following

$0.585 \mathrm{g} \mathrm{NaCl}/100 \mathrm{cc} \mathrm{soln}.$

Calculate the normality of the following

$0.49 \mathrm{g} {\mathrm{H}}_2{\mathrm{SO}}_4/1000\mathrm{cc} \mathrm{soln}.$