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?

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