It appears that the progression here is starting with sodium sulfide $Na2S$ and then going through a series of chemical reactions to ultimately end up with sodium nitrate $NaNO3$.

Na2S $sodiumsulfide$ can react with oxygen $O2$ to form sodium peroxide $Na2O2$.Sodium peroxide $Na2O2$ can then react with water $H2O$ to form sodium hydroxide $NaOH$.Sodium hydroxide $NaOH$ can then react with hydrochloric acid $HCl$ to form sodium chloride $NaCl$.Finally, sodium chloride $NaCl$ can react with silver nitrate $AgNO3$ to form sodium nitrate $NaNO3$.

This progression showcases a series of chemical reactions involving sodium compounds that lead to the formation of sodium nitrate.