Chemistry

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Suppose the osmotic pressure of blood at 37 °C is 7.65 atm and
you are preparing an intravenous (IV) NaCl solution for a
patient. What concentration (in M) of NaCl solution should you
prepare so the resulting IV solution is isotonic with blood, if
the van’t Hoff factor of NaCl is i=1.86?

I have no clue with that one... Please help!!

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