1 1 gram of SO 2 for every million mL of air (parts per million by mass per volume). 2  Write ppm in terms of cubic meters. 3  There are a million cubic centimeters in a cubic meter (1 cm 3 = (10 -2) 3 m 3 = 10 -6 m 3) so one part per million of SO 2 by volume in air is actually 1 cm 3 SO 2 / 1 m 3 of air. 1 gram of SO 2 for every million grams of air (parts per million by mass); 2  1 mL of SO 2 for every million mL of air (parts per million by volume); 3  1 gram of SO 2 for every million mL of air (parts per million by mass per volume). 4  Write ppm in terms of cubic meters.
EXPERT ANSWER. Coal if formed when dead animals and plants got buried inside the layer of Earth. The layers increase form time to time and more dead plants and animals get buried in the layers.Therefore, coal is found in layers.For example, let us consider the layers of sandwich, on the first bread we apply the toppings and cover it another slice. Then some more topping is added to second slice and is covered by third slide.XPERT ANSWER. Coal if formed when dead animals and plants got buried inside the layer of Earth. The layers increase form time to time and more dead plants and animals get buried in the layers.
America is the Saudi Arabia of Coal Plant fossils of West Virginia are examples of the fossil flora that comprise the vast coal reserves that are typical in the Eastern United States. Coal is formed from ancient plant material accumulating over long periods of time in swamp conditions so devoid of oxygen that bacteria could not exist to cause decay. Being composed almost entirerly of plant fossils, coal is in effect concentrated sunlight, and is one of our most important fossil fuels. The United States as a whole has more recoverable coal resources than any other country on the planet-- over 262 billion tons-- enough to last over 200 years!