Caclrandt
+ Na PO
2(aq)

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a

i believe the answer is three water molecules