We are being asked to calculate the mass percentage and parts per million of the concentration of a 0.0720 M aqueous solution of fluoride, F_{2}.

Recall that molarity is given by the following equation

$\overline{){\mathbf{Molarity}}{\mathbf{}}{\mathbf{=}}{\mathbf{}}\frac{\mathbf{mol}\mathbf{}\mathbf{of}\mathbf{}\mathbf{solute}}{\mathbf{Liters}\mathbf{}\mathbf{of}\mathbf{}\mathbf{solution}}}$

Part A. Mass percentage

The mass percentage is given by the following equation

$\overline{){\mathbf{\%}}{\mathbf{}}{\mathbf{mass}}{\mathbf{}}{\mathbf{=}}{\mathbf{}}\frac{\mathbf{mass}\mathbf{}\mathbf{solute}}{\mathbf{mass}\mathbf{}\mathbf{solution}}{\mathbf{\times}}{\mathbf{100}}}$

Express the concentration of a 0.0720 M aqueous solution of fluoride, F_{2}, in mass percentage and in parts per million. Assume the density of the solution is 1.00 g/mL.

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