Question

Helen mixes a first solution, 4 liters of 40% concentrated sulfuric acid solution, with a second solution, 5 liters of a sulfuric acid solution with a stronger concentration, and the resulting solution is 9 liters of 50% concentrated sulfuric acid solution. What was the concentration, as a percent, of the second solution

Answer 1

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Answer 2

Answer:

58

Explanation:

4*40/100=1.6

9*50/100=4.5

4.5-1.6=2.9

5*x/100=2.9

x=58

ans: 58