Answer:
hope it helped you
Explanation:
3 atoms of nitrogen and 4 atoms of hydrogen in each molecule
Answer:
I think 4 I can't remember
Answer: FeO is called ferrous oxide while Fe2O3 is ferric oxide
Explanation:
Ferrous oxide, commonly known as iron(II) oxide contains iron that lost 2 elections in the oxidation process. So it is able to bond with other atoms that have an extra 2 electrons to share. Ferric oxide, is commonly known as iron(III) oxide
Answer:

Explanation:
Hello there!
In this case, according to the solubility equilibrium of calcium hydroxide:

Whereas the equilibrium expression is:
![Ksp=[Ca^{2+}][OH^-]^2](https://tex.z-dn.net/?f=Ksp%3D%5BCa%5E%7B2%2B%7D%5D%5BOH%5E-%5D%5E2)
It is firstly necessary to calculate the molar solubility given the grams and volume of the dissolved solute:

Now, according to the Ksp expression, we plug in s as the solubility to obtain:

Regards!