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Answer: Molarity of a solution : 0.416 M
In our question LiI(Lithium Iodide) is solute and we need to find the moles of LiI.
Given grams of LiI = 27.8g , Volume of solution = 500 mL
Molar mass of LiI = 133.85 g/mol
Moles of LiI = 0.208 mol
To find molarity we need volume of solution in 'L' , so we need to convert 500 mL to L.
1 L = 1000 mL
Volume = 0.5 L
Molarity = or 0.416 M