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Answer :
the molarity of the solution formed by dissolving 97.7 g of LiBr in enough water to yield 1500.0 mL of solution is approximately 0.750 M.
To calculate the molarity of a solution, we need to divide the moles of solute by the volume of the solution in liters.
First, let's calculate the moles of LiBr using the given mass and its molar mass:
Molar mass of LiBr:
Li: 6.941 g/mol
Br: 79.904 g/mol
Molar mass of LiBr = 6.941 g/mol + 79.904 g/mol = [tex]86.845 g/mol[/tex]
Moles of LiBr = [tex]Mass / Molar mass[/tex]
Moles of LiBr = 97.7 g / 86.845 g/mol
Next, we need to convert the volume of the solution from milliliters to liters:
[tex]Volume of the solution = 1500.0 mL = 1500.0 mL / 1000 mL/L = 1.500 L[/tex]
Now, we can calculate the molarity:
Molarity (M) = Moles of solute / Volume of solution (in liters)
Molarity = Moles of LiBr / Volume of solution
[tex]Molarity = (97.7 g / 86.845 g/mol) / 1.500 L[/tex]
Calculating this, we find:
Molarity ≈ [tex]0.750 M[/tex]
Therefore, the molarity of the solution formed by dissolving 97.7 g of LiBr in enough water to yield 1500.0 mL of solution is approximately 0.750 M.
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