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Calculate the molarity of the solution produced by mixing the following substances. (Assume that the volumes are additive.)

(a) 40.0 mL of 0.160 M NaCl and 65.0 mL of 0.133 M NaCl

and

Using modern analytical techniques, it is possible to detect strontium ions in concentrations as low as 2.0e+02 pg/mL. What is this detection limit expressed in each of the following units?

(a) molarity of Sr2+

(b) Sr2+ ions per cubic centimeter

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