The forensic technician at a crime scene has just prepared a luminal stock solut

Question

The forensic technician at a crime scene has just prepared a luminal stock solution by adding 12. 0g of luminal into a total volume of 75. 0 mL of H2O What is the morality of the stock solution of luminal? Before investigating the scene, the technician must dilute the luminol solution to a concentration of 6. 00x10-2 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? Express your answer with the appropriate units.

Explanation / Answer

sol: 12.0 g / 177 g/mol = 0.068 mol 0.0687 mol / 0.075 liters = 0.904 M 0.0600 M/liter x 2.00 liters = 0.120 mol

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