Can you please help me ASAP

How many miles of water are produced if 5.43 mol pbo2 are consumed

Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. which label belongs to the area marked z?