Write a balanced chemical equation for the reaction of hydrogen with oxygen to produce water.

Balance the following chemical reaction:

$\mathrm{AgCl}\left(\mathrm{s}\right)\to \mathrm{Ag}\left(\mathrm{s}\right)+{\mathrm{Cl}}_2\left(\mathrm{g}\right)$

Balance the following chemical reaction:

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

Balance the following chemical reaction:

$\mathrm{Zn}+\mathrm{HCl}\to {\mathrm{ZnCl}}_2+{\mathrm{H}}_2$

Balance the following chemical reaction:

$\mathrm{Zn}+\mathrm{NaOH}\to {\mathrm{NaZnO}}_2+{\mathrm{H}}_2$

The question given in the textbook seems to be wrong, modified question is 

$\mathrm{Zn}+\mathrm{NaOH}\to {\mathrm{Na}}_2{\mathrm{ZnO}}_2+{\mathrm{H}}_2$