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Answered 2010-02-24 00:19:02

Molarity = moles of solute / total volume of solution (L or dm3)

Moles LiBr = 97.7 g / (6.94 + 79.9) g mol-1

=1.13 mol

M = n / V

= 1.13 mol / 0.7500 L

= 1.50 M

There are only three significant figures in the mass of the solute but four in the volume, therefore, answer can not be more than three significant figures.

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