Given the reaction 4 Fe+ 3 O2 --- 2 Fe2O3
Based on the above reaction, the mole ratio of iron to oxygen gas is 4:3.
What is the mole ratio of iron to Fe2O3?
What is the mole ratio of oxygen gas to iron?
What is the mole ratio of Fe2O3 to oxygen gas?

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange

Define the kinetic molecular theory

If one fission reaction of a uranium-235 atom produced two neutrons, how many neutrons would be released if the chain reaction occurred three more times?