What is the purpose of the arrow in a chemical equation?

A) It indicates the direction in which the reaction occurs.

B) It separates the elements from the compounds.

C) It indicates the direction of increase in the number of molecules.

D) It indicates the direction of heat movement in a reaction.

Agas diffuses 1/7 times faster than hydrogen gas (h2). what is the molar mass of the gas? 100.10 g/mol 98.78 g/mol 86.68 g/mol 79.98 g/mol

What is true of composite volcanoes?

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, .)