If the equation is balanced: The coefficient numbers in the equation show the number of molecules, formula units, or atoms of the species involved in.
A cloud is made up of liquid water droplets. A cloud forms when air is heated by the sun. As it rises, it slowly cools it reaches the saturation point and water condenses, forming a cloud. As long as the cloud and the air that its made of is warmer than the outside air around it, it floats!
Air, even clear air, contains water molecules. Clouds exist in the atmosphere because of rising air. As air rises and cools the water in it can condense out, forming clouds. Since clouds drift over the landscape, they are one of the ways that water moves geographically around the globe in the water cycle.