PLEASE HELP!!! A 84.1 g sample of phosphorus reacts with 85.0 g of oxygen gas according to the following chemical equation.

4 P(s) + 5 O2(g) → 2 P₂O5

a. Find the limiting reactant.

b. How many grams of P₂O5 are produced in theory?

c. If only 123 g of P2O5 are produced, what is the percentage yield?

Which ocean zone has the most abundant primary producer and why a) the abyssopelagic zone ,du to the absence of light and cold water temperatureb) the bathypelagic zone, due to the absence of light and cold water temperaturec) the mesopelagic zone ,due to uts high light availability and warm water temperature d) the epipelagic zone,due to its high light availability and warm water temperature

How many liters of oxygen gas, at standard temperature and pressure, will react with 35.8 grams of iron metal? 4 fe (s) + 3 o₂ (g) → 2 fe₂o₃ (s)

May someone me with these science questions