Explain forensic scientists in analyzing crime scenes

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Reference no: EM13185986

1)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 177 g/mol

Question: Before investigating the scene, the technician must dilute the luminol solution to a concentration of 5.00×10?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?

2) A student placed 20.0
g of glucose (C6H12O6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.-mL mark on the neck of the flask was reached. The flask was then shaken until the solution was uniform. A 40.0-mLsample of this glucose solution was diluted to 0.500 L. How many grams of glucose are in 100. mL of the final solution?
Express your answer numerically in grams.

Reference no: EM13185986

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