Ответ: СПС

Ответ: Mr (Na2CO3) = 23 * 2 + 12 + 16 * 3 = 106Mr (Ca3(PO4)2) = 40 * 3 + (31 + 16 * 4) * 2 = 120 + 190 = 310Mr (CuCl2) = 64 + 35.5 * 2 = 135Mr (H2SO4) = 1 * 2 + 32 + 16 * 4 = 98Mr (P2O5) = 31 * 2 + 16 * 5 = 142