Write the name using a Roman numeral:

${\mathrm{Ag}}_2\mathrm{O}.$

Write the name using a Roman numeral:

$\mathrm{FeO}.$

Write the name using a Roman numeral:

${\mathrm{Hg}}_2{\mathrm{I}}_2.$

Write the name using a Roman numeral:

${\mathrm{MnO}}_2.$

Write the name using a Roman numeral:

$\mathrm{Pb}{\left({\mathrm{NO}}_3\right)}_2.$

Balance the following equation:

$\mathrm{Fe}+{\mathrm{Cl}}_2\to {\mathrm{FeCl}}_3$

Balance the following equations:

$\mathrm{Cu}{\left({\mathrm{NO}}_3\right)}_2\to \mathrm{CuO}+{\mathrm{NO}}_2+{\mathrm{O}}_2$

Balance the following equation:

${\left({\mathrm{NH}}_4\right)}_2{\mathrm{Cr}}_2{\mathrm{O}}_7\to {\mathrm{Cr}}_2{\mathrm{O}}_3+{\mathrm{H}}_2\mathrm{O}+{\mathrm{N}}_2$

Balance the following equation:

$\mathrm{Al}+{\mathrm{O}}_2\to {\mathrm{Al}}_2{\mathrm{O}}_3$