Calculate the formula masses of the following compounds:
(i) Calcium chloride
(ii) Sodium carbonate
(Given: Atomic masses: Ca = 40 u; Cl = 35. 5 u; Na = 23 u; C = 12 u; O = 16 u)
(i) Formula Mass of Calcium chloride (CaCl2) = 1xCa + 2xCl = (40+71) u = 111 u
(ii) Formula Mass of Sodium carbonate (Na2CO3) = 2xNa + 1xC + 3xO = (2x23 + 1x12 + 3x16) u = 106 u