Select the equations that are correctly balanced.

a. h2o + 2o2 → h2o2
b. fe2o3 + 3h2 → 2fe + 3h2o
c. al + 3br2 → albr3
d. caco3 → cao + co2

What type of electromagnetic radiation has a shorter wavelength than blue light

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

Explain what happens at the saturation point when adding salt to water at room temperature.