19. write formulas for the following substances.\na. ammonia\nb. nitric acid\nc. sulfuric acid\nd. sodium…

Explanation:

Step1: Recall ammonia formula

Ammonia consists of one nitrogen atom and three hydrogen atoms. Its formula is $NH_3$.

Step2: Recall nitric - acid formula

Nitric acid is composed of one hydrogen atom, one nitrogen atom, and three oxygen atoms. Its formula is $HNO_3$.

Step3: Recall sulfuric - acid formula

Sulfuric acid has two hydrogen atoms, one sulfur atom, and four oxygen atoms. Its formula is $H_2SO_4$.

Step4: Recall sodium - nitrite formula

Sodium nitrite has one sodium atom, one nitrogen atom, and two oxygen atoms. Its formula is $NaNO_2$.

Step5: Recall ozone formula

Ozone is a tri - atomic oxygen molecule. Its formula is $O_3$.

Step6: Recall cesium superoxide formula

Cesium superoxide has one cesium atom and one superoxide ion ($O_2^-$). Its formula is $CsO_2$.

Step7: Recall phosphoric - acid formula

Phosphoric acid has three hydrogen atoms, one phosphorus atom, and four oxygen atoms. Its formula is $H_3PO_4$.

Step8: Recall ammonium nitrate formula

Ammonium nitrate contains an ammonium ion ($NH_4^+$) and a nitrate ion ($NO_3^-$). Its formula is $NH_4NO_3$.

Step9: Recall sodium hypochlorite formula

Sodium hypochlorite has one sodium atom, one chlorine atom, and one oxygen atom. Its formula is $NaClO$.

Answer:

a. $NH_3$ b. $HNO_3$ c. $H_2SO_4$ d. $NaNO_2$ e. $O_3$ f. $CsO_2$ g. $H_3PO_4$ h. $NH_4NO_3$ i. $NaClO$