<span>B. type of matter that we cannot see but that we believe makes up more than 20% of the universe C. matter made of ordinary atoms, such as hydrogen or helium atoms </span>
The pressure of just nitrogen, oxygen, and argon in the air is 0.78 atm, if the total atmospheric pressure is 1.00 atm.
What distinguishes atmospheric pressure from air pressure?
As opposed to atmospheric pressure, which refers to the force of the earth's atmosphere, air pressure is the force of the air around us. Mercury barometers are used to measure atmospheric pressure, while tore gauges are used to measure air pressure.
Why is atmospheric pressure created?
What applies pressure on the atmosphere is the mass of the air molecules above. It weighs down on whatever is underneath because of the massive quantity of air molecules that collectively make up the layers of our atmosphere. Air molecules of all sizes carry some weight.
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PH is a scale of how much ionic hydrogen is in a substance. The scale runs from 0 to 14. The lower the number on the scale, the more acidic the substance is (that means there are more hydrogen ions than hydroxide ions). The higher the number on the scale, the more basic the substance is (that means that there are more hydroxide ions than hydrogen ions).
