Scientists have shown that in our solar system, the planets orbit the sun. Which of the following BEST explains why the planets orbit the sun? A. The sun is larger in size and has a greater mass than each of the planets. B. The sun is smaller in size and has a greater mass than each of the planets. C. The sun is larger in size and has a smaller mass than each of the planets. D. The sun is smaller in size and has a smaller mass than each of the planets.

15) a substance used in manufacturing gasoline consists of finely divided platinum supported on an inert solid. suppose that the platinum is formed by the high temperature reaction between platinum (iv) oxide and hydrogen gas. the other product is water. a) write and balance the equation b) how many grams of hydrogen are needed to produce 1.0 g of platinum metal? c) how many moles of water are produced at the same time? how many grams? ( show work, .)