Posted by margrav2 on Sunday, December 5, 2010 at 10:13pm.
Molar mass NaCl = 58.442
30.0 g is 30.0/58.442 = 0.5133 moles.
2.5 mM = 0.0025M
M = moles/L of soln.
0.0025 = 0.5133/L of soln
Solve for L.
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