When in isotonic solution how will the mass of a carrot change?

In an isotonic solution, the concentration of solutes inside the carrot cells is equal to that of the surrounding solution. As a result, there is no net movement of water in or out of the cells, so the mass of the carrot will remain relatively unchanged. However, there may be minor fluctuations due to factors like slight evaporation or absorption, but these are generally negligible. Overall, the carrot will maintain its mass in an isotonic environment.