Respuesta :

maacastrobr

Answer:

34.9 mL

Explanation:

First we convert 23.6 g of LiBr into moles, using its molar mass (86.845 g/mol):

  • 23.6 g ÷ 86.845 g/mol = 0.272 mol LiBr

Now we can calculate the required volume, using the definition of molarity:

  • Molarity = moles / liters
  • liters = moles / Molarity
  • 0.272 mol / 7.8 M = 0.0349 L

We can convert L into mL:

  • 0.0348 L * 1000 = 34.9 mL