If there are 0.505 g of NaCl (58.44 g/mol) left in a beaker that originally contained 75.0 mL of saltwater, what must have been the concentration of the original solution?
A) 0.00647 M
B) 0.0115 M
C) 0.0673 M
D) 0.115 M
E) 0.673 M
Correct Answer:
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