Answer:
An ecosystem is a community of species.
Explanation:
i hope this helps i tried^^
The answer is B. two chlorine atoms.
The chemical formula of the compound is BaCl2~
Answer:
The first ionization energy for K is less than Ca because Ca has a larger effective nuclear charge.
Answer:
CuCl2 + 2NaNO3 - > Cu(NO3)2 + 2NaCl
<span>Fe(NO3)2
The NO3 part is a poly-atomic ion with total charge -1.
This is because Fe has a +2 charge and two NO3's with a -1 charge will balance out to 0.
Most often we just make the assumption that Oxygen has a -2 oxidation number because it is very electro-negative.
So to find N, we just need an oxidation number that balances out with 3(-2) to get -1 (the total charge of the ion)</span>
