You need 455 mL of a 5% alcohol solution. On hand, you have a 65% alcohol mixture. How much of the 65% alcohol mixture and pure water will y

Question

You need 455 mL of a 5% alcohol solution. On hand, you have a 65% alcohol mixture. How much of the 65% alcohol mixture and pure water will you need to obtain the desired solution?

You need :
___ ml of pure water
And
___ ml of the 65% solution

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Natalia 3 weeks 2021-09-28T04:34:16+00:00 1 Answer 0

Answers ( )

    0
    2021-09-28T04:36:10+00:00

    Answer:

    You need: 420 mL pure water and 35 mL of the 65% solution

    Step-by-step explanation:

    let 65% alcohol mixture = x mL

    y = water

    x + y = 455

    0.65x / 455 =  0.05

    0.65x = 22.75

    x = 35

    recall, 35 + y = 455

                       y =  420

    You need: 420 mL pure water and 35 mL of the 65% solution

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45:7+7-4:2-5:5*4+35:2 =? ( )