How does the amount of oxygen in inhaled air compare to the amount of oxygen in exhaled air? a. there is 21% oxygen in inhaled air, 78% in exhaled air. b. there is 0% oxygen in exhaled air. c. there is 78% oxygen in inhaled air, 15% in exhaled air. d. there is 21% oxygen in inhaled air, 15% in exhaled air.
There is 21% oxygen in inhaled air and 15% oxygen in exhaled air.
What is oxygen?
The chemical element with the atomic number 8 and symbol O is called oxygen.
It belongs to the periodic table's chalcogen group, is a very reactive nonmetal, and an oxidizing agent that easily produces oxides with most elements as well as other compounds.
After hydrogen and helium, oxygen is the third most plentiful element in the universe and the most abundant element on Earth.
Two atoms of the elements combine to generate dioxygen, a colorless and odorless diatomic gas, at ordinary temperature and pressure.
The Earth's atmosphere is currently made up of 20.95% diatomic oxygen gas, though this has fluctuated significantly over a very long time. The Earth's crust is almost 50% oxygen in the form of oxides.
