thodegirl
contestada

Before investigating the scene, the technician must dilute the luminol solution to a concentration of 4.00×10−2 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?

Respuesta :

Yna9141
Molarity is a unit of concentration that is also equal to molarity per liter. The number of moles of the substance, in this case luminol, is calculated through the equation,

         n = M x V

where n is the number of moles, M is the molarity, and V is the volume (should be in liters). Substituting the known values,

       n = (4.0 x 10⁻² M)(2 L)
       n = 8 x 10⁻² moles

ANSWER: 8 x 10⁻² moles
soneyedesola44

8 x 10⁻² moles of luminol are present in the 2.00L of the diluted spray.

  • The number of moles =?
  • The molarity = (4.0 x 10⁻² M)  
  • Volume = 2L

Molarity refers to the molar concentration of solution and expressed as the number of moles of solute in one liter of solution. In other words, it is the concentration of a solution in regards to the number of moles of the solute in one liter of solution.

Further Explanation

To determine the Molarity of a solution, the moles of solute will be divided by the liters of solution. This can be expressed as:

Molarity = moles of solute / liters of solution

if you cross multiply, then you have:

N = M x V

Therefore, In the given question, the mole of luminol can be calculated using the Equation below:

N = M x V , where

  • N represents the number of moles
  • M represents molarity
  • V represents the Volume (liters of solution)

If you substitute the Values, then you have:

n = (4.0 x 10⁻² M) (2 L)

n = 8 x 10⁻² moles

Thus, 8 x 10⁻² moles of luminol are present in the 2.00L of the diluted spray.

LEARN MORE:

  • Before investigating the scene, the technician must dilute the luminol solution to a concentration of 4.00×10−2 M https://brainly.com/question/5685664
  • 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 https://brainly.com/question/2814870

KEYWORDS:

  • luminol
  • diluted solution
  • molarity
  • moles
  • diluted spray
  • solute per liter

Otras preguntas