Question

FeS2-Fe2O3-Fe-Fe(NO3)2-FeS

Answer 1

не поняла,почему там Fe после Fe2O3

Answer 2

The compounds in the sequence you provided are:

• FeS2: Iron disulfide, also known as pyrite.
• Fe2O3: Iron(III) oxide, also known as hematite.
• Fe: Elemental iron.
• Fe(NO3)2: Iron(II) nitrate.
• FeS: Iron(II) sulfide.

These compounds represent different oxidation states of iron and different combinations of iron with other elements. Iron can exist in various oxidation states, including +2, +3, and +4, and can form compounds with a wide range of other elements. Each of these compounds has its own properties and uses in various fields such as chemistry, geology, and engineering.