Madrid PAU Biology Practice Questions - Madrid PAU Biology Examination - UCM & Public Universities (Biología 2o Bachillerato 2026) Exam

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Calculate the osmotic pressure (π) at 27 °C (300 K) for a 0.2 M aqueous solution of sodium chloride (NaCl), assuming complete dissociation (van 't Hoff factor i = 2) and R = 0.0821 L·atm/(mol·K).

9.85 atm 4.93 atm 2.46 atm 19.70 atm

Correct Answer:

9.85 atm

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