SOLUTION: Hi, here is an science and medicine word problem that I think I have worked out and I would appreciate your input. A chemist has 300 milimeters(mL)of solution that is 18% acid. Ho

Algebra ->  Linear-equations -> SOLUTION: Hi, here is an science and medicine word problem that I think I have worked out and I would appreciate your input. A chemist has 300 milimeters(mL)of solution that is 18% acid. Ho      Log On


   

Question 112205: Hi, here is an science and medicine word problem that I think I have worked out and I would appreciate your input.
A chemist has 300 milimeters(mL)of solution that is 18% acid. How many milimeters of acid are in the solution?
What I have come up with is this;
300x=18
x=18/300
x=0.06%
The answer I have is; 6% mL of acid are in the solution. Am I correct on this one.
Thank You, Barb Neely
Answer by BrittanyM(80) About Me  (Show Source):
You can put this solution on YOUR website!
This is not exactly right. :( Sorry.

But I would love to help you re-work the problem. :)

We have to think of this problem in terms of parts over whole. There is 18% of 100%, and xmL over the whole of 300mL.

So:
We just need to find 18% of 300mL, and that will give us the exact amount of acid in the solution.

Since 18% is equal to 0.18, we just need to multiply
300mL x 0.18
Which is 54mL

So there's our answer, there are 54mLs of acid in the solution.