What is the mole ratio of  to Fe? if oxygen it is 4:3 Fe3O4
The answer is B...
because any of the others could have an opinion based answer but B will always be the same its a fact not opinion.
Explanation:
The number of moles of solute present in liter of solution is defined as molarity.
Mathematically, Molarity = 
Also, when number of moles are equal in a solution then the formula will be as follows.

It is given that
is 8.00 M,
is 7.00 mL, and
is 0.80 M.
Hence, calculate the value of
using above formula as follows.



= 70 ml
Thus, we can conclude that the volume after dilution is 70 ml.
Answer:
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