Given A = {a, b, c, d, e} B = {a, e, i, o, u} C = {c, d, e, u} . Show that A\ (B\C) ≠ (A\B)\C
Match the following compounds with their molecular mass.
(i) SO2 (ii) CO2 (iii) NO2 (iv) H2O
(a) 44 u (b) 64 u (c) 18 u (d) 46 u