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.
Instead I used an average human lung tidal volume of 500 ml at a breath rate between 10 and 20 breaths per minute with 60 minutes per hour and 24 hours per day.ypical resting adult respiratory rates are 10â20 breaths per minute with 1/3 of the breath time in inspiration. According to Wikipedia: The average pair of human lungs can hold about 6 liters of air, but only a small amount of this capacity is used during normal breathing.