Suppose that a 10-mL sample of a solution is to be tested for I -ion by addition of 1 drop (0.2 mL) of 0.10 M Pb1NO3 22 . What is the minimum number of grams of I -that must be present for Pbl2 1s2 to

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, .)