SOLUTION: What is the percentage strength of a mixture containing 30mL of 7% iodine and 30 mL of 2 % iodine?

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Question 616424: What is the percentage strength of a mixture containing 30mL of 7% iodine and 30 mL of 2 % iodine?
Answer by josmiceli(19441) About Me  (Show Source):
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+.07%2A30+=+2.1+ ml
+.02%2A30+=+.6+ ml
The concentration is:
+%28+2.1+%2B+.6+%29+%2F+%28+30+%2B+30+%29+=+2.7+%2F+60+
+2.7%2F60+=+.045+
+.045%2A100+=+4.5+
The concentration is 4.5%