Question

Помогите плиз прошу надо срочно

Answer 1

а) Mr ((NH4)2HPO4) = Ar (N) * N (N) + Ar (H) * N (H) + Ar (P) * N (P) + Ar (O) * N (O) = 14 * 2 + 1 * 9 + 31 * 1 + 16 * 4 = 132;

б) Mr (Na3PO4) = Ar (Na) * N (Na) + Ar (P) * N (P) + Ar (O) * N (O) = 23 * 3 + 31 * 1 + 16 * 4 = 164.