9th grade
posted by SHAKAYLA on .
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

After this, please type your school subject in the appropriate box.

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.