Question

Вычислите относительные молекулярные массы веществ: CuS,PBr5,Lu3P,MoS3,Na3P04,Al3P04,Fe2(S4)3,H2S04

Answer 1

Ответ:

Mr(CuS)=54+32=86г/моль

Answer 2

Mr (CuS) = Ar (Cu) * N (Cu) + Ar (S) * N (S) = 64 * 1 + 32 * 1 = 96;

Mr (PBr5) = Ar (P) * N (P) + Ar (Br) * N (Br) = 31 * 1 + 80 * 5 = 431;

Mr (Li3P) = Ar (Li) * N (Li) + Ar (P) * N (P) = 7 * 3 + 31 * 1 = 52;

Mr (MoS3) = Ar (Mo) * N (Mo) + Ar (S) * N (S) = 96 * 1 + 32 * 3 = 192;

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

Mr (AlPO4) = Ar (Al) * N (Al) + Ar (P) * N (P) + Ar (O) * N (O) = 27 * 1 + 31 * 1 + 16 * 4 = 122;

Mr (Fe2(SO4)3) = Ar (Fe) * N (Fe) + Ar (S) * N (S) + Ar (O) * N (O) = 56 * 2 + 32 * 3 + 16 * 12 = 400;

Mr (H2SO4) = Ar (H) * N (H) + Ar (S) * N (S) + Ar (O) * N (O) = 1 * 2 + 32 * 1 + 16 * 4 = 98.