The chemical 5-amino-2,3-dihydro-1,4-phthalazinedione... better known as luminol, is used by forensic scientists in analyzing crime scenes for the presence of washed-away blood. Luminol is so sensitive that it can detect blood that has been diluted 10,000 times. A basic solution of luminol is often sprayed onto surfaces that are suspected of containing minute amounts of blood.
Luminol has a molecular weight of 177g/mol

Part A-The forensic technician at a crime scene has just prepared a luminol stock solution by adding 10.0g of luminol to H2O creating a solution with a total volume of 75.0 mL.
What is the molarity of the stock solution of luminol?
***The answer for part a is 0.753M

Part B- Before investigating the scene, the technician must dilute the luminol solution to a concentration of 6.00×10?2M . 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?
***The answer for part B is 0.120 mol

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