Final answer:
The question lacks context for defining Ω. However, explanations for interpreting the position of the school and understanding the ionization of carbonic acid in terms of positive, negative, or neutral values are provided.
Step-by-step explanation:
The question regarding whether Ω is positive, negative, or zero appears to be incomplete as there's no clear definition of what Ω represents in the context provided. However, we can address the other parts of the inquiry. When the origin is at Kosma's house, and the position of the school is +300 m with positions towards the left defined as positive, it implies that the school is 300 meters to the left of Kosma's house. Conversely, if the position of the school is -300 m and positions to the left are negative, the school would be 300 meters to the right of Kosma's house. In both cases, Ω could represent displacement, yet there isn't enough context to determine its value as positive, negative, or zero.
The scenario described as a straight line with a negative slope or positive slope suggests a relationship between two variables, typically found in a graph representing mathematical functions or physical phenomena like motion. If Ω were to represent such a variable, its positive or negative nature would be determined by the slope of the line.
Concerning the chemistry part of the question, the symbols 'HCO3 superscript negative' and 'H2CO3' represent chemical species involved in the first ionization of carbonic acid (H2CO3), which dissociates into hydrogen ions (H3O+) and bicarbonate ions (HCO3-). Determining concentrations of these species usually requires knowledge of the equilibrium constant for the reaction and the initial concentration of carbonic acid.