ISBS #13-18

13.

14. (I) Element (II) Element (III) Compound (IV) Element (V) Compound (VI) Element
15. Compounds and Elements.
16a. Hydrogen, Phosphate, Oxygen
16b. Sodium, Oxygen, Hydrogen.
16c. Sulfer, Oxygen
17a.

17b. ?
17c. 2 Hydrogen one Chlorine
18a. NaH₂C₂lO_3
18b.?