How does the mass of the water compare to the mass of the ice?

The mass of water is the same as the mass of ice

MASS is the same for both water and ice, 18 grams/mol. The DENSITIES are not the same and the VOLUMES are not the same. Density is mass per unit volume. The density of ice is LESS than the density of water and that is why ice floats.

Answer it is also known as the completion state is untrue of the activation complex;