Answer:
These substances are called amphiprotic. Water, amino acids, hydrogen carbonate ions, and hydrogen sulfate ions are common examples.
Explanation:
A substance is amphoteric (from Greek amphoteros = "each of two") if it can act as an acid or a base.
For example, aluminum hydroxide is amphoteric because it can act as a base and neutralize strong acids.
You can reduce the charges and subscripts so it is PbS2
8.43
58.44g/mol*1/6.93g= 8.43moles of NaCL
Zn (Zinc) is metal
Ne (Neon) is nonmetal
Mg (Magnesium) is metal
Fe (Iron) is metal
Cl (Chlorine) is nonmetal