Answer:
The structures are attached in file.
Hydrogen bonding and intermolecular forces is the reason for ranks allotted.
Explanation:
In determining Lewis structure, we calculate the overall number of valence electrons available for bonding. Making carbon (the least electronegative atom) the central atom in the structure, we allocate valence electrons until each atom has achieved stability.
In order of decreasing affinity to water molecules:
This is due to the fact that the 
will accept protons more readily than the bicarbonate ion, 
. Carbonic acid, 
will not accept any more protons, hence it is the least attractive to water molecule, even though soluble.
Answer:
Moles = 8 moles
Solution:
Molarity is given as,
Molarity = Moles / Volume of Solution ------ (1)
Data Given;
Molarity = 2 M
Volume = 4 L
Solving eq.1 for Moles,
Moles = Molarity × Volume of Solution
Putting values,
Moles = 2 mol.L⁻¹ × 4 L
Moles = 8 moles
That would be the cobalt(11) Chloride Hexahydrate
Answer:
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