Question

please help me please​

Answer 1

Answer:

A) Al$_{2}$O$_{3}$2H$_{20}$ , MgCO$_{3}$ , Fe$_{3}$O$_{4\\}$ and MgSO$_{4\\}$7H$_{2}$O are the oxide ores.

B) There are 7 water molecules in Epson salt.

C) Galeena (PbS) is the ore for Lead.

D) Fe$_{3}$O$_{4\\}$ is the ore for iron.