Peroxide

How much-distilled water (in liters) must pharmacists pour into 300 ml of 32.7% solution of hydrogen peroxide to get 2.8% solution to gargle?

Final Answer:

V =  3.2 l

Step-by-step explanation:

V1​=300 ml→ l=300:1000  l=0.3 l r1​=32.7%=10032.7​=0.327 r2​=2.8%=1002.8​=0.028  V1​⋅ r1​=(V+V1​)⋅ r2​ 0.3⋅ 0.327=(V+0.3)⋅ 0.028  0.028V=0.0897  V=0.0280.0897​=3.20357143  V=280897​≐3.203571=3.2 l

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algebrabasic operations and conceptsnumbersUnits of physical quantitiesthemes, topicsGrade of the word problem

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