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A pharmacist wants to make 30ml of a 40% hydrogen peroxide solution. How many mls of 46% hydrogen peroxide must he mix with 36% hydrogen peroxide to make the desired solution?

Respuesta :

sqdancefan

Answer:

  12 mL of 46% solution

Step-by-step explanation:

Let q represent the volume of 46% solution needed in the mix. Then the total amount of hydrogen peroxide in the solution is ...

  0.46q +0.36(30 -q) = 0.40(30)

  0.10q +10.8 = 12.0

  0.10q = 1.2

  q = 12 . . . . . . mL of 46% solution needed

He must mix 12 mL of 46% solution to make the desired result.

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... and 18 mL of 36% solution

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