Question

A solution containing 2.8 moles of magnesium bromide is combined with a solution containing excess potassium carbonate. This chemical reaction takes place:
MgBr2(aq) + K2CO3(aq) → MgCO3(s) + 2KBr(aq).

If the volume of the resulting solution is 1.33 liters, what’s the concentration of potassium bromide? Use the periodic table.

A.
0.24 M
B.
2.1 M
C.
3.7 M
D.
4.2 M
E.
5.6 M