Chemistry Questions that I can't work out properly.?

[Jesse]

How many unpaired electrons are there in the complex ion [FeCl4]-? (assume that the complex ion is tetrahedral).

How many unpaired electrons are there in the complex ion [Ni(H2O)6]2+? (water - weak field ligand)

The spin only magnetic moment for the complex [Cr(H2O)6]2+ is (water - weak field ligand):

What is the coordination number about the metal ion for the complex [Co(NH3)4Cl2]Cl?

How many unpaired electrons are there in the complex ion [Fe(CN)6]3-?

Which of the following is a d7 ion?
A. Zn(II)
B. Fe(III)
C. Mn(VII)
D. V(IV)
E. Co(II)

Which of the following d orbital splitting diagrams is correct for the complex ion [Fe(H2O)6]3+? (water - weak field ligand)
A. (dxy)2 (dxz)2 (dzy)1 (dx2-y2)(dz2)
B. none of these listed here
C. (dxy)1 (dxz)1 (dzy)1 (dx2-y2)1 (dz2)1
D. (dxy)2 (dxz)1 (dzy)1 (dx2-y2)1 (dz2)

The spin only magnetic moment for the complex [V(H2O)6]2+ is (water - weak field ligand):