SOLUTION: how much salt should be added to 1000 milliliters of a 2% salt solution to get a 4% salt solution?

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Question 1027353: how much salt should be added to 1000 milliliters of a 2% salt solution to get a 4% salt solution?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
how much salt should be added to 1000 milliliters of a 2% salt solution to get a 4% salt solution?
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Add S mls of salt
1000*2 + S*100 = (1000+S)*4