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9 February, 14:25

The forensic technician at a crime scene has just prepared a luminol stock solution by adding 19.0 g of luminol into a total volume of 75.0 mL of H2O. What is the molarity of the stock solution of luminol?

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  1. 9 February, 17:33
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    Molarity of Limonol is

    M = 1.43mol/L

    Explanation:

    M = mols/L

    mols = g/molar mass

    Therefore, determine molar mass, divide into grams luminol and divide that by 75 mL (in liters) to obtain molarity = M.

    Molar mass of Limonol = 177.16 g/mol

    mols = 19g / 177.16 g/mol

    mols = 0.1072mol

    Molarity of Limonol, M = 0.1072 mol / 0.075

    M = 1.43mol/L
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