Which element has the greatest density at stp? 1. carbon 2. copper 3. chlorine 4. calcium

Match the mixture with the substance// i really need on this guys (it’s a pic btw)

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

How many moles are in 123.0 grams of kclo4?