magnisum oxide
This is not a true compound but is mixture of Ammonium fluoride and Hydrogen fluoride , NH4F . HF
The correct name is mercury(II) sulfide.
You have the formula and symbols wrong but it is probably nickel acetate.
Iron (II) oxide.
GeH4 is called germane, germanium hydride, geranium tetrahydride, or monogermane.
That would be magnesium hydroxide, though the formula is usually written as Mg(OH)2
Magnesium hydride, MgH2
The formula of the hydride formed with magnesium is MgH2.
Magnesium and hydrogen
Covalent bond
-1 for each H, +2 for Mg
the compound name is atoms.
The name of this compound is iodine heptafluoride.
Tetranitrogen tetraselenide is the name of the compound.
The name of the compound CH4 is methane.
The name of the compound H2C2O4 is oxalic acid.
carya tomentosa the name for a compound leaf