Air does have weight. 14.7 psi in fact. Most of the air is Nitrogen gas, which is 2 atoms of nitrogen. There is also Oxygen gas (O2). Finally there is Carbon Dioxide (CO2). There is also a small percentage of other gasses, but they are insignificant.
Answer:
A
Explanation:
it takes the energy from light and turns it into food
The chemical structure shows what the red blood cell does.and the physical appearance also shows the same.
AB maybe I’ll make sure just wait
Hormones are a group of chemicals released by exocrine glands
These hormones are directly secreted into bloodstream from where they reach the site.
