2020 12
100
I
(10 2.0 ,20 )
1. H2(g)F2(g)===2HF(g) H 270 kJ mol1 ( )
A
B 1 mol H 21 mol F2 2 mol HF 270 kJ
C 1 mol H 21 mol F 2 2 mol HF
D
2.
A
B Ba(OH) 2?8H2ONH 4Cl
C CO2
D
3.
A
B
C
D
4.
A
B
