Final answer:
The correct tool for solving chemistry problems depends on the context and cannot be determined from the given options without additional information. It is recommended to consult course materials or an instructor for clarification.
Step-by-step explanation:
The tool that solves chemistry problems can be any software or application designed specifically to aid in solving various chemistry-related calculations or problems. However, without context, it is not possible to determine the correct answer from options A. ChemSolver, B. ChemCalc, C. ChemTool, D. ChemSolver+ as it can be specific to a software or app known to the institution or might be mentioned in the curriculum of the course. To effectively answer this question, I would need more information about the context in which these tools are mentioned or you could consult your course material or instructor for the correct tool that you should use for your chemistry problems.