A solution is obtained by mixing 300g of 25 solution and 400g of 40 solution by mass

English
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a solution is obtained by mixing 300g of 25 solution and 400g of 40 solution by mass

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a solution is obtained by mixing 300g of 25 solution and 400g of 40 solution by mass

Answer: To find the resulting concentration of the solution after mixing, we can use the formula:

C = (m1C1 + m2C2) / (m1 + m2)

where:
C = resulting concentration
m1 = mass of first solution
C1 = concentration of first solution
m2 = mass of second solution
C2 = concentration of second solution

Plugging in the values given in the problem, we get:

C = (300g x 0.25 + 400g x 0.40) / (300g + 400g)
C = (75 + 160) / 700
C = 0.35 or 35%

Therefore, the resulting solution has a concentration of 35%.