Answer:
The molarity is 90 M
Explanation:
Molarity is a measure of concentration that indicates the amount of moles of solute (in this case CaCl2) in 1 liter of solution (1000ml). In this case we calculate it that way:
200 ml solution ------18 mol CaCl2
1000ml solution----------x= (1000ml solutionx18 mol CaCl2)/200 ml solution
x=90 mol CaCl2---> the solution is 90 M
