Give the composition of air with a pie chart. Explain the importance of each gas?
Answers
Oxygen: In addition to its industrial uses, oxygen gas is essential for respiration in most living organisms. Humans breathe it. Plants release oxygen as a by-product of photosynthesis, but also use it for respiration.
Nitrogen: Most of the Earth's atmosphere consists of nitrogen, our bodies can't break the chemical bond between the atoms and use the element from the gas. Nitrogen gas, sometimes mixed with carbon dioxide, aids in food preservation. Some incandescent light bulbs contain nitrogen gas instead of argon. Nitrogen gas is a good fire suppression agent. People sometimes inflate tires with nitrogen instead of air because it avoids problems caused by water vapor in air and excessive gas expansion and contraction with temperature changes. Nitrogen gas, sometimes with carbon dioxide, pressurizes beer kegs. Nitrogen gas inflates air bags in automobiles. It's used for intentional asphyxiation as a form of euthanasia
Carbon dioxide: Carbon dioxide makes soft drinks bubbly and makes the news as a greenhouse gas. It has many important uses. Plants need oxygen to perform photosynthesis. Humans need carbon dioxide too. It acts as a signal, telling the body when to breathe. Carbon dioxide forms bubbles in beer and sparkling wine. It's a common food additive and swimming pool chemical used to regulate acidity. Carbon dioxide finds use in fire extinguishers, lasers, and dry cleaning.
Argon (Ar): welding, provides an inert atmosphere for materials
