0.004 what is the ph solution

Which element would mostly likely have an electron affinity measuring closest to zero

Iam hoping to create 5.72 grams of glucose. the plant was given 4.75 liters of co2 and 2.81 g of h20. which reactant was the limiting reagent? how much excess mass did we have of the other reactant?

What is the number of neutrons in an atom with atomic mass of 35