There should be 3 valence electrons surrounding the aluminum ion
Answer:
C. The enthalpy of a reaction is the sum of the enthalpies of intermediate reactions.
Explanation:
The heat of any reaction ΔH∘f for a specific reaction is equal to the sum of the heats of reaction for any set of reactions which in sum are equivalent to the overall reaction.
interstellar cloud of dust, hydrogen, helium and other ionized gases.
One species will often exhibit an advantage in
resource use. This superior competitor will out-compete the other with more
efficient use of the limiting resource. As a result, the inferior competitor
will suffer a decline in population over time. It will be excluded from the
area and replaced by the superior competitor. Without it and having intra-specific
and inter-specific relationships in a community will lead to a harmonious community
and maintain the biodiversity.