c = n/v
c = concentration
n = number of moles
v = volume
&
n = m/M
n = number of moles
m = mass
M = molecular weight
also;
C1V1 = C2V2
C1 = initial concentration
V1 = initial volume
C2 = final concentration
V2 = final concentration
So between these equations you can determine molar concentrations.
Is this what you needed?