Displacement reactions are useful for thermite welding, steel making, extraction of metals and relief from acid indigestion.
Altitude is height above sea level. The density of air decreases with height. There are two reasons, at higher altitudes there is less air pushing down from above,and gravity is weaker farther from earths center.
Answer:
A diamond is a pure substance because it is made of one element.
Explanation:
From the crystalline structure model of the diamond, we can see that we only have just one element represented by the green balls connected in a cross linked fashion to one another. Therefore, one can rightly conclude that this is a pure substance made up of one element.
In a pure substance, all parts are homogeneous and composition is definite.
The number of Atoms must be the same on both sides
