State TWO characteristics that the respiratory surface used for gaseous exchange in humans have in common with the respiratory surface used in flowering plants. Explain how EACH characteristic makes the respiratory surface suitable for gaseous exchange.

You are performing an experiment in a lab to attempt a new method of producing pure elements from compounds. the only problem is that you do not know what element will form. by your previous calculations you know that you will have 6.3 moles of product. when it is complete, you weigh it and determine you have 604.4 grams. what element have you produced?

Which other elements contain the same number of outer electrons as sodium

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li