●Mᵣ(C₂H₆) = 2Aᵣ(C) + 6Aᵣ(H) = 2*12 + 6*1 = 24 + 6 = 30.Ответ : 80%.●Mᵣ(K₂CO₃) = 2Aᵣ(K) + Aᵣ(C) + 3Aᵣ(O) = 2*39 + 12 + 3*16 = 78 + 12 + 48 = 138.Ответ : 8,7%.●Mᵣ((NH₄)₂CO₃) = 2Aᵣ(N) + 8Aᵣ(H) + Aᵣ(C) + 3Aᵣ(O) = 2*14 + 8*1 + 12 + 3*16 = 28 + 8 + 12 + 48 = 96.Ответ : 12,5%.●Mᵣ(Al₄C₃) = 4Aᵣ(Al) + 3Aᵣ(C) = 4*27 + 3*12 = 108 + 36 = 144.Ответ : 25%.
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●Mᵣ(C₂H₆) = 2Aᵣ(C) + 6Aᵣ(H) = 2*12 + 6*1 = 24 + 6 = 30.
Ответ : 80%.
●Mᵣ(K₂CO₃) = 2Aᵣ(K) + Aᵣ(C) + 3Aᵣ(O) = 2*39 + 12 + 3*16 = 78 + 12 + 48 = 138.
Ответ : 8,7%.
●Mᵣ((NH₄)₂CO₃) = 2Aᵣ(N) + 8Aᵣ(H) + Aᵣ(C) + 3Aᵣ(O) = 2*14 + 8*1 + 12 + 3*16 = 28 + 8 + 12 + 48 = 96.
Ответ : 12,5%.
●Mᵣ(Al₄C₃) = 4Aᵣ(Al) + 3Aᵣ(C) = 4*27 + 3*12 = 108 + 36 = 144.
Ответ : 25%.