Molecules made up of two or more elements are called compounds. Water, calcium oxide, and glucose are molecules that compound.
The temperature decreases because there is no ozone in the mesosphere and the amount of air is decreasing.
Although all gases closely follow the ideal gas law PV = nRT under appropriate conditions, each gas is also a unique chemical substance consisting of molecular units that have definite masses. In this lesson we will see how these molecular masses affect the properties of gases that conform to the ideal gas law.
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