CHEM

Help on part "c":

The forensic technician at a crime scene has just prepared a luminol stock solution by adding 19.0g of luminol into a total volume of 75.0mL of H2O.

a)What is the molarity of the stock solution of luminol?
answer I got: molarity of luminol solution = 1.43M

b)Before investigating the scene, the technician must dilute the luminol solution to a concentration of 6.00×10−2 M. The diluted solution is then placed in a spray bottle for application on the desired surfaces.

How many moles of luminol are present in 2.00 L of the diluted spray?
answer I got: moles of luminol =
0.120mol

I cannot get the correct answer for "c"...I have tried: 172mL,11.9mL, and 1.19*10^4mL. The only other possibility that I can come up with is: 83.9mL. Would this one be correct?...Or...am I still completely out to lunch???

C)- What volume of the stock solution (Part A) would contain the number of moles present in the diluted solution (Part B)?
Express your answer in milliliters.

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  1. duplicate post

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    bobpursley
  2. Divide pART b TO a

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