Ответ:
Mr[Fe2(CO3)3]= 2×Ar(Fe)+3×Ar(C)+6×Ar(O)= 2×56+3×12+6×16=244
Mr[Al(OH)3]=Ar(Al)+3×Ar(O)+3×Ar(H)=27+3×16+3×1=78
Mr[K2O]=2×Ar(K)+Ar(O)= 2×39+16=94
Mr[Li3PO4]=3×Ar(Li)+Ar(P)+4×Ar(O)=3×7+31+4×16=116
Мr [Fe2(CO3)3]= Ar(Fe) * 3 + (Ar(C) *3+ Ar(O) * 9) = 56*3 + 12*3 + 16 * 9 = 168 + 36 + 144 = 348
Мr [Al(OH)3]= Ar(Al) + (Ar(O) * 3 + Ar(H) * 3) = 27 + 16*3 + 1*3 = 78
Мr (K2O)= Ar(K) * 2 + Ar(O) = 39 * 2 + 16 = 94
Мr (Li3PO4) = Ar(Li) * 3 + Ar(P) + ArO) * 4 = 7* 3+31 + 16*4 = 109
Объяснение:
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Answers & Comments
Ответ:
Mr[Fe2(CO3)3]= 2×Ar(Fe)+3×Ar(C)+6×Ar(O)= 2×56+3×12+6×16=244
Mr[Al(OH)3]=Ar(Al)+3×Ar(O)+3×Ar(H)=27+3×16+3×1=78
Mr[K2O]=2×Ar(K)+Ar(O)= 2×39+16=94
Mr[Li3PO4]=3×Ar(Li)+Ar(P)+4×Ar(O)=3×7+31+4×16=116
Ответ:
Мr [Fe2(CO3)3]= Ar(Fe) * 3 + (Ar(C) *3+ Ar(O) * 9) = 56*3 + 12*3 + 16 * 9 = 168 + 36 + 144 = 348
Мr [Al(OH)3]= Ar(Al) + (Ar(O) * 3 + Ar(H) * 3) = 27 + 16*3 + 1*3 = 78
Мr (K2O)= Ar(K) * 2 + Ar(O) = 39 * 2 + 16 = 94
Мr (Li3PO4) = Ar(Li) * 3 + Ar(P) + ArO) * 4 = 7* 3+31 + 16*4 = 109
Объяснение: