Calcium carbonate is a chemical compound with the formula CaCO3. It is a common substance found in rocks as the minerals calcite and aragonite (most notably as limestone, which contains both of those minerals) and is the main component of pearls and the shells of marine organisms, snails, and eggs.
An ordinary breath for a 70-kg adult is about 500ml of air. We call this the tidal volume. Since oxygen is 21% by volume of air, then the volume of oxygen inhaled is about 105ml. The density of pure oxygen at sea level is 1.43kg per cubic metre.
What is the process by which inhalation occurs during breathing in human beings? This is the process of respiration. It involves bringing in air from outside the body into the lungs. When we breathe in, the size of our chest increases.This happens because â¦when air enters, the lungs expand and the ribs move outwards. Simultaneously, the diaphragm contracts and becomes flat.