\(n_{O_2}=\dfrac{1,6}{32}=0,05\left(mol\right)=>n_A=0,05\left(mol\right)\)

=> \(M_A=\dfrac{3}{0,05}=60\left(g/mol\right)\)

=> D

C

\(SO_2+H_2O⇌H_2SO_3\)

\(K_2O+H_2O\rightarrow2KOH\)

\(BaO+H_2O\rightarrow Ba\left(OH\right)_2\)

\(SO_3+H_2O\rightarrow H_2SO_4\)

B

C

C

A

11. B
12. C
13. D
14. A

1 I'd rather you didn't go out this Christmas

2 I'd rather the children went to bed

3 I'd rather you helped your mother with housework

4 I'd rather you didn't come to class late

5 I'd rather you kept silent in the classroom

It's time

1 It's time for you to dress yourself

2 It's about time the children went to bed

3 It's time we hurried up or we will be late for the train

4 It's high time children went to bed

5 It's about time for us to go home

5:

a: AD/CD=BA/BC=3/5

b: ΔBAD đồng dạng vói ΔBHD

ΔCHD đồng dạng với ΔCAB

c: ΔCHD đồng dạng với ΔCAB

=>HD/AB=CD/CB

=>HD*CB=AB*CD