Answer:
0,39M.
Explanation:
Molarity is a concentration measure that expresses the moles of solute per liter of solution. In this case it is calculated with the simple rule of three:
4,3 L solution------1,68 moles of Cs3N
1 L solution .--------x= (1 L solution x 1,68 moles of Cs3N)/4,3 L solution
x=0,39 moles of Cs3N-----> The solution is 0,39 M