Question 22 of 32 Which question would most likely be studied by a biologist?
A. How much ultraviolet radiation passes through the atmosphere?
B. What causes cancer cells to grow uncontrollably?
C. How can cancer-causing substances be regulated?
D. How can a drug that treats cancer be synthesized?

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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i think its 100.

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