Based on collision theory, which factor will slow down a chemical reaction? A. Correct orientation of molecule B. More collisions between atoms
C. Increasing the number of molecules in the same volume
D. Lowering the kinetid energy of molecules​

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.

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c- cold periods in earth's history during which glaciers covered much of the surface.

explanation:

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