The formula of calcium chloride is CaCl2\text{CaCl}_2CaCl2.
What is the relative formula mass of calcium chloride?
(ArA_rAr: Ca=40.1\text{Ca} = 40.1Ca=40.1, Cl=35.5\text{Cl} = 35.5Cl=35.5)
75.6
111.1
151.2
115.7