Posted by SHAKAYLA on Monday, July 26, 2010 at 1:34pm.
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?  Ms. Sue, Monday, July 26, 2010 at 1:53pm
After this, please type your school subject in the appropriate box.

9th grade  bobpursley, Monday, July 26, 2010 at 4:40pm
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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