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!
Water clouds tend to have sharp edges, and ice clouds are more wispy. Middle clouds include altocumulus and altostratus clouds. These are usually water clouds, except when it is cold enough at that altitude in the atmosphere for ice crystals to form. Low clouds include stratocumulus, cumulus, stratus, cumulonimbus, and nimbostratus clouds. These clouds are generally made of water droplets. Cumulus and cumulonimbus clouds can be very tall, with their tops as high as middle or high level clouds, but their bases are as low as the other low clouds. For tips on how to tell how high a cloud is in the sky, look for clues on each cloud type page.