the answer is x>5 ^'utdtxdursuurs7
Using the pH=-log[ hydrogen ions], assuming the pH of water is 7 then using the concept that kw=[ OH] [H+], then the [H+]= 10 power minus 7,since kw=10 to the power minus 14
2H2+O2→2H2O
We have to be aware that the number of atoms are the same on both reactant side and product side.
200 is the answer let me know if you need anything
Answer : The net ionic equation for the precipitation of manganese (II) carbonate from its aqueous solution is given below :

This reaction is an example of displacement reaction.