Using the following balanced formula, determine the number of molecules of CH4 needed to produce 12 molecules of CCl4.
CH4 + 4C12 --> CC14 + 4HCI

The density of water is 1 g/cm cubed and in order for the pebble to sink its density has to be greater than the density of water and in order for the twig to float its density has to be less than the density of water

Both models are effective because they show the valence electrons, and these valence electrons indicate the reactivity of an element.