How many molecules are in h2o2

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

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

What is formed when amino acids form long chains or polymerize