Question

Giúp mình c31

Answer 1

Câu 31 : 

\(n_{H_2SO_4}=0.8\left(mol\right)\)

\(n_{H_2O}=n_{H_2SO_4}=0.8\left(mol\right)\)

\(BTKL:\)

\(m_M=37.6+0.8\cdot98-0.8\cdot18=101.6\left(g\right)\)

=> D 

Answer 2

31 D

33 D

35 A

36 A

37 B

38 D

39 D