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How many grams of water must be added to 2 grams of a 65% iodine solution in order to produce a 42% iodine solution? Round your answer to the nearest tenth

• 9th grade science? math? -

You want to add M grams of water to 2 grams of .65 solution?

amount of iodine in final= amount of iodine in initial

.42(M+2)=.65(2)
solve for M.

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