Okay so this is half math half

100g libr
= 4 mol/l
l

i know i need to find l and everything but how do i start the problem?

So you need to find the volume in L? If so:
Convert the mass of Lithium Bromide into moles by dividing the 100 grams by the molar mass of LiBr, taken from the periodic table 
In a solution, moles = (concentration in mole/L) x (volume in L)
We know the moles, we have the concentration in mole/L, now find the volume in L, and you should get 0.288. Plz do the math and check for yourself

You know how the first one if filled up like the objects do the same but with the other categories

It is 4.92 e-4 sorry if i am wrong