Explain carbon using four important processes such as photosynthesis, respiration, decomposition and combustion

In photosynthesis, CO2 (carbon dioxide) is a reactant, along with water and sunlight make glucose.

in cellular respiration CO2 is a product in the reaction C6H12O6 + 6O2 --> 6CO2 + 6H2O

Combustion reactions normally burn and the products are carbon dioxide and water

decomposition reactions occur when carbonic acid breaks down to produce CO2 and H20

Explanation:

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 !