Teacher:In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Teacher: Now, understand the problem? Solve this instance: In mass spectrometry, an aromatic cation with this many carbon atoms often appears at m over z equals 91. The signal for the central proton of an isopropyl group will have this many peaks in proton NMR. A violet-colored strong oxidizing agent has a metal in this oxidation state. That compound is potassium permanganate. This is the number of elemental gases that are diatomic at standard conditions. This integer is equal to the negative log of hydronium concentration of pure water at 25 degrees Celsius, and is also the number of valence electrons possessed by the most electronegative element, fluorine. For 10 points, give this number equal to the neutral pH value.
Student:
Science