SOLUTION: How many grams of powder do you need to add to 15mLs of sterile water to make a 50% solution?

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Question 815449: How many grams of powder do you need to add to 15mLs of sterile water to make a 50% solution?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
I will answer this as weight per weight, and NOT as weight per volume.

15 ml of water can be taken as 15 grams of water, assuming density near enough to 1.00 gram per milliliter.

Let m = mass as grams of powder to add to get 50% solution,
m%2F%28m%2B15%29=0.50
m=0.5%28m%2B15%29
m=0.5m%2B15%2F2
m-0.5m=7.5
0.5m=7.5
highlight%28m=15%29