Answer
0.57 M
Work Step by Step
It is given that a 205 mL sample of ocean water contains 6.8 g of NaCl.
Molar mass of NaCl = 58.44
Molarity = (weight/molecular mass)(1000/V in mL)
= (6.8/58.44)(1000/205)
= 0.116 / 0.205
= 0.57 M
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