Ответ:
1). Mr(Na2S) =23×2+32=78
Mr(HF) = 1+19=20
Mr(Na2S) > Mr(HF)
2) Mr(N2) =14×2=28
Mr(C4H10) =12×4+1×10=38
Mr(N2) < Mr(C4H10)
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Ответ:
1). Mr(Na2S) =23×2+32=78
Mr(HF) = 1+19=20
Mr(Na2S) > Mr(HF)
2) Mr(N2) =14×2=28
Mr(C4H10) =12×4+1×10=38
Mr(N2) < Mr(C4H10)