A scientist is studying four eukaryotic organisms. Some of the characteristics of these organisms are described in the table below.
Characteristics of Four Eukaryotic Organisms

Organism # Multicellular or
Unicellular? Cell Wall
Present? Autotrophic or
Heterotrophic? How Does it
Move Around
its Environment?
1 multicellular yes heterotrophic It is unable to
move around
its environment.
2 unicellular no autotrophic It uses a
flagellum.
3 multicellular no heterotrophic It has a
musculoskeletal
system.
4 multicellular yes autotrophic It is unable to
move around
its environment.
Each of the organisms belongs to a different kingdom. Match each organism with the correct kingdom.

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !

they are all solids.

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.