относительная молекулярная масса
Mr ( Fe ( O H) 3 )=
Mr ( Mg (N O3) 2 )=
Mr ( Al P O4 )=
Mr ( Na3 P O4 )=
Mr ( Zn ( N O3 ) 2 )=
Mr ( Fe ( O H) 3 )=
Mr ( Mg (N O3) 2 )=
Mr ( Al P O4 )=
Mr ( Na3 P O4 )=
Mr ( Zn ( N O3 ) 2 )=
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Ответ:
1. Mr (Fe (OH) 3) = Ar (Fe) + Ar (O) * 3 + Ar (H) * 3 = 56 + 16*3 + 1*3 = 107
2. = Ar(Mg) + Ar(N) *2 + Ar(O) *6= 24 + 14*2 + 16*6=148
3. = Ar(Al) + Ar(P) + Ar (O) *4 = 27 + 31 + 16*4 = 122
4. = Ar(Na) *3 + Ar(P) + Ar(O) *4 = 23*3 + 31 + 16*4 = 164
5. = Ar(Zn) + Ar(N) *2 + Ar(O) * 6 = 65 + 14*2 + 16*6 = 189