Assuming a stock concentration of 0.075 mM fluorescein, calculate the volume necessary to make 100 mL of a 0.029 microM fluorescein standard. The volumes will be fairly small and you'll use an eppendorf pipette to do the transfer. Report your answer as a whole number in microliter

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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1 is the answer to this problem