Answer:
NaF and KBr
Explanation:
These two substances contain pure ionic bonds. LiI is a covalent compound because of the Large polarizing power of Li and the high polarizability of I(Fajan's rules). The other compounds mentioned are organic compounds. They are not soluble in water at all.
Answer:
D. Vibrating around fixed positions
Explanation:
It's right on edge
Au^2S^3+ 3H^2 = 2Au + 3H^2S
