In the Eqn: [3 Fe + 2 O2 → Fe3O4], How many moles of Fe3O4 will be produced from 86.8 L of O2 at STP with an excess of Iron?

In which reaction is precipitation occurring?

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?

Suppose you mix one mole of sulfuric acid (h2so4) with 1 mole of sodium hydroxide(naoh). why does the ph of the solution remain below 7? ( explain so i can get better understanding! )