SOLUTION: a chemistry student has 45 milliliters of a 20% salt solution. how many milliliters of salt are in the solution?

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Question 1043564: a chemistry student has 45 milliliters of a 20% salt solution. how many milliliters of salt are in the solution?
Found 2 solutions by stanbon, ikleyn:
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
a chemistry student has 45 milliliters of a 20% salt solution. how many milliliters of salt are in the solution?
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Ans:: 0.20*45 = 9ml
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Cheers,
Stan H.
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Answer by ikleyn(52814) About Me  (Show Source):
You can put this solution on YOUR website!
.
Salt usually/(sometime? always?) is a crystal solid body or a powder media.

And it is not measured in milliliters. It is measured in grams, for such a situation.

And the concentration, in this case, is (gram/gram) dimensionless measure.

So, if the solution is 45 gram in mass, then there is

45%2A%2820%2F100%29 = 45%2A%281%2F5%29 = 45%2F5 = 9 gram of salt.