поставьте знаки меньше(),сравнив Ar и Mr пар химических элементов и молекул:а)Na Pб)N Clв)H2SO4 H3PO4г)PH3 NH3д)Cu Znе)H

а) Ar (Na) = 23;Ar (P) = 31;Na < P;б) Ar (N) = 14;Ar (Cl) = 35,5N < Cl;в) Mr (H₂SO₄) = Ar (H) * N (H) + Ar (S) * N (S) + Ar (O) * N (O) = 1 * 2 + 32 * 1 + 16 * 4 = 98;Mr (H₃PO₄) = Ar (H) * N (H) + Ar (P) * N (P) + Ar (O) * N (O) = 1 * 3 + 31 * 1 + 16 * 4 = 98;H₂SO₄ = H₃PO₄;г) Mr (PH₃) = Ar (P) * N (P) + Ar (H) * N (H) = 31 * 1 + 1 * 3 = 34;Mr (NH₃) = Ar (N) * N (N) + Ar (H) * N (H) = 14 * 1 + 1 * 3 = 17;PH₃ > NH₃;д) Ar (Cu) = 64;Ar (Zn) = 65;Cu < Zn;е) Mr (N₂O₅) = Ar (N) * N (N) + Ar (O) * N (O) = 14 * 2 + 16 * 5 = 108;Mr (P₂O₅) = Ar (P) * N (P) + Ar (O) * N (O) = 31 * 2 + 16 * 5 = 142;N₂O₅ < P₂O₅.