Which of the following is not an example of a physical change?

condensation of water vapor in the atmosphere

stretching of a rubber band until it breaks

freezing of a sugar solution to form a popsicle

precipitation of a solid from the combination of two liquids

What happens to the atomic radius when an elctron is lost

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

We are hoping to create 5.72 grams of glucose. the plant was given 4.75 liters of co2 and 2.81 g of h20. which reactant was the limiting reagent? how much excess mass did we have of the other reactant?