in the boring by the some readion 1+O(x)+MOO_(2)(x)arrow 2H_(2)O(l)+MnO_(2)(x)+O_(2)(x) anywalked from the 21times 12^2molecilesH_(2)O 54times 12^24molecules_(2)0 411 pointoko 125times 12^2moleculesH_(2)O

The correct answer is:

$$125\times 12^{2}moleculesH_{2}O$$

This expression represents the number of water molecules produced in the reaction $$1+O(x)+MOO_{2}(x)\rightarrow 2H_{2}O(l)+MnO_{2}(x)+O_{2}(x)$$ . The coefficient 125 indicates the number of water molecules produced, and $$12^{2}$$ represents the number of molecules of water.