A tennis ball could be used to represent the Sun because it is round and yellow. Which of these other things could also be a good model for the Sun? A. a light bulb
B. an eraser
C. a Kleenex box
D. an empty cup

The solid xy decomposes into gaseous x and y: xy(s) m x(g) + y(g) kp = 4.1 (at 0 °c) if the reaction is carried out in a 22.4 l container, which initial amounts of x and y will result in the formation of solid xy?