text: This letter denotes a quantity which describes the compensation of the loss of chemical potential from the addition of a solute.
full_question: This letter denotes a quantity which describes the compensation of the loss of chemical potential from the addition of a solute. That quantity denoted by this letter is computed as the product of the molar concentration, the ideal gas constant, the temperature, and the van ’t Hoff factor, and is known as the (*) osmotic pressure. According to Hückel’s Rule, aromatic molecules are characterized by 4n+2 electrons designated by this letter, and bonds designated by this letter occur when two lobes of an atomic orbital overlap with two lobes of another atomic orbital. For 10 points, identify this letter which denotes bonds that are weaker than sigma bonds and also denotes the ratio of a circle’s circumference to its diameter.
first_sentence: This letter denotes a quantity which describes the compensation of the loss of chemical potential from the addition of a solute.