How many dozen of eggs are there in 3500 eggs?

What semimetal can form four single covalent bonds.

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

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation: