Why doesn't it matter which nonradioactive isotope of oxygen you breathe?

Because they all have the same chemical properties and can be used for breathing.

Explanation:

Conceptually, isotopes are atoms that have the same number of protons, that is, they are distinct species of the same element, differing only in the number of masses and neutrons.

Oxygen is a colorless, odorless and tasteless gas, poorly soluble in water, present in nature as three stable isotopes: oxygen 16 (present in 99.75% of occurrences in the environment); oxygen 17 (0.37% of occurrences) and oxygen 18 (0.20% of occurrences). All forms of non-radioactive isotope of oxygen can be breathed by living beings, because they all use the same kind of chemical properties, so all have the same function.

african americans demonstrated their newly found freedom by relocating often in search of relatives whom they had been separated from during slavery. others established schools to educate freed people and they built institutions such as churches and political organizations to advocate for their rights.

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.