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27 March, 11:11

Determine the molarity of a solution formed by dissolving 97.7 g LiBr in enough water to yield 750.0 ml of solution.

A) 1.50 M

B) 1.18 M

C) 0.130 M

D) 0.768 M

E) 2.30 M

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  1. 27 March, 11:53
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    A. 1.50 M

    Explanation:

    Concentration is the number of moles of solute dissolved in a volume of 1 L of solution

    Mass of LiBr - 97.7 g

    Number of moles of LiBr - 97.7 g / 87 g/mol = 1.12 mol

    Equation for concentration is as follows

    Concentration = number of moles / volume of solution in L

    Substituting the values

    Concentration = 1.12 mol / 0.7500 L

    Concentration of LiBr is 1.50 mol/L
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