Question

Giúp mình câu 50,52 với 🥲

Answer 1

Câu 50:

\(CTTQ.este.no.đơn.hở.của.ancol.etylic.là:RCOOC_2H_5\\ Mà:M_X=18,5.4=74\left(\dfrac{g}{mol}\right)\\ \Leftrightarrow M_R+73=74\\ \Leftrightarrow M_R=1\\ \Rightarrow R:H\\ \Rightarrow CTTG.X:HCOOC_2H_5\\ \Rightarrow Chọn.A\)

Answer 2

Câu 52:

\(n_{CH_3COOC_2H_5}=\dfrac{4,4}{88}=0,05\left(mol\right)\\ CH_3COOC_2H_5+NaOH\rightarrow\left(H^+,t^o\right)CH_3COONa+C_2H_5OH\\ n_{CH_3COONa}=n_{este}=0,05\left(mol\right)\\ m_{muối}=m_{CH_3COONa}=82.0,05=4,1\left(g\right)\\ \Rightarrow Chọn.A\)