Posted by Nene on Sunday, February 19, 2012 at 1:55pm.
To be technical about it, the molarity can't be calculated. The definition of molarity is moles/L of SOLUTION. Placing NaCl in 750 mL water will NOT produce 750 mL of solution; the final solution will be greater than 750 mL.
I will assume the author of the problem MEANT to write soln instead of water.
mol NaCl = grams/molar mass
Then M = moles/L soln (0.750 L)
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