# 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)?

1. 👍
2. 👎
3. 👁
1. duplicate post

1. 👍
2. 👎
👤
bobpursley
2. Divide pART b TO a

1. 👍
2. 👎

## Similar Questions

1. ### 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? anwer

2. ### Chem 1

The forensic technician at a crime scene has just prepared a luminol stock solution by adding 15.0g of luminol into a total volume of 75.0 \rm mL of \rm H_2O. What is the molarity of the stock solution of luminol? 1.13M Before

3. ### college

he forensic technician at a crime scene has just prepared a luminol stock solution by adding 12.0 g of luminol into a total volume of 75.0 \rm mL of \rm H_2O.

4. ### Chemistry!

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

1. ### Chemistry

A. The forensic technician at a crime scene has just prepared a luminol stock solution by adding 13.0 g of luminol into a total volume of 75.0 mL of H2O. -What is the molarity of the stock solution of luminol? B. Before

2. ### Chemistry

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

3. ### criminology

Which of the following is not part of Due Process? You can only be tried again for a crime if there is substantial new concrete information. You can not be arrested or tried for a crime without evidence You can call witnesses and

4. ### Physical Science

At a crime scene, the forensic investigator notes that the 7.0-g lead bullet that was stopped in a doorframe apparently melted completely on impact. Assuming the bullet was fired at room temperature (20°C), what does the

1. ### Bio Help

Suppose two suspects in a crime have DNA profiles that match the one DNA fragment tested. What should happen next? A)Both suspects must be guilty and should be charged with the crime. B)The test should be repeated because a

2. ### stoichiometry

A confiscated white substance, suspected of being cocaine, was purified by a forensic chemist and subjected to elemental analysis. Combustion of a 50.86-mg sample yielded 150.0 mg CO2 and 46.05 mg H2O. Analysis for nitrogen showed

3. ### Chemistry

The forensic technician at a crime scene has just prepared a luminol stock solution by adding 17.0 of luminol into a total volume of 75.0 of . What is the molarity of the stock solution of luminol?

4. ### Language Arts

1. PART A Which of the following answer choices best describes the doctor's goals in this scene? A. To show Carmody how much he dislikes him B. To get Carmody's daughter the medical assistance she needs*** C. To get Carmody in