chemistry

How many mL of a 0.90% (m/v) NaCl stock solution will you need to to prepare 250 mL of a 0.225% m/v NaCl solution?

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asked by nate
  1. The dilution formula, which works for M, m, and N (perhaps others) is
    mL x % = mL x %.
    Substitute and solve for mL.

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    posted by DrBob222
  2. 225

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    posted by lena

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