So this is nomenclature.
The name would be Iron (III) Chloride Hexahydrate
Reason why it's Iron (III) is because of the 3 after Cl, if you take FeCl3 apart it's
![Fe^{3+}](https://tex.z-dn.net/?f=Fe%5E%7B3%2B%7D%20)
and Cl^-.
Hexahydrate because hexa = 6 and hydrate=water
The term hydrate would be wrong because that clearly doesn't come first
It would be the anhydrous compound that comes first. The "an" in "anhydrous" means "without". Hydrous=water, so anyhdrous= without water
The part without water is FeCl3. The water is 6H2O
The prefix for the coefficient of water is 6, or hexa, but that's not first in the name
A potassium atom has a higher proton number meaning that it has more protons and electrons. Due to the Octet Rule, the more electrons an atom has the more shells it has and so will be bigger in size.
Hope this was helpful x
The mass of a nickel- 60 nucleus is 59.9308 amu."
Mole is equal to mass of the element divided by molar mass of the element. that is
mole=mass/molar mass
From periodic table calcium has a molar mass of 40 g/mol
moles is therefore =800g/40g/mol=20moles