Name the following compound

${\mathrm{Ag}}_2\mathrm{S}$

Name the following compound

${\mathrm{Mg}}_3{\mathrm{N}}_2$

Name the following compound

${\mathrm{NaHCO}}_3$

Balance the following equations:

${\mathrm{K}}_2\mathrm{O}+{\mathrm{H}}_2\mathrm{O}\to \mathrm{KOH}$

Balance the following equations:

${\mathrm{N}}_2+{\mathrm{H}}_2\leftrightarrow {\mathrm{NH}}_3$

Balance the following equations:

${\mathrm{SO}}_2+{\mathrm{O}}_2\leftrightarrow {\mathrm{SO}}_3$

Balance the following equations:

$\mathrm{Pb}+{\mathrm{O}}_2\to \mathrm{PbO}$

Balance the following equations:

${\mathrm{P}}_4+{\mathrm{O}}_2\to {\mathrm{P}}_2{\mathrm{O}}_5$

Balance the following equations:

${\mathrm{Na}}_2\mathrm{O}+{\mathrm{H}}_2\mathrm{O}\to \mathrm{NaOH}$