Volcanoes in Hawaii began forming on the seafloor, about 5,100 m below the surface. If a volcanoe reaches the surface in 300,000 years, what was it's rate if vertical growth per year? Answers;
A. 0.017 m/y
B. 600 m/y
C. 17 m/y
D. 0.06 m/y

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, .)