There are TWO atoms in one molecule of hydrogen.
It is not a pure substance, because a solution are mixed chemicals in a way that the molecules are not bonded with one another. Thus, separating them from compounds and elements, which are pure substances.
I believe the type of compound fe3n2 is ionic.
EXPLANATION:
Alliance is an approach in which two or more companies agree to pool their resources together to form a combined force in the marketplace. Unlike a merger, an alliance does not involve the emergence of a new combined entity. ... The joint venture is a very popular form of an alliance.
The answer is: Nucleus (same as in plant cells)
