Final answer:
The mass of water mixed with excess zinc oxide cannot be determined with the information given. Additional specifics about the reaction and the mass or volume of water are necessary.
Step-by-step explanation:
The mass of water mixed with excess zinc oxide cannot be determined from the information provided. To calculate the mass of water that would react with zinc oxide, one would need to know the specific reaction equation and the reactant ratios. Since zinc oxide is in excess, we would need the mass of the other reactant, likely water, to be specific, which isn't given. Moreover, density knowledge, such as the fact that 1 cm³ of zinc has a mass of about 7 grams or that metals like zinc generally have a density greater than water, is not directly applicable to finding the mass of water mixed with zinc oxide without additional information on reaction conditions.