5 phân tử K₂CO₃

Phải có hình mới làm đc ạ 

1. Her parents won’t let her_______ with her friends.
A. go out        B. goes out                     C. to go out           D. going out
2. It takes a long time ______ a foreign language.
A. learn       B. to learn                       C. learning            D. learns
3. From the tower, they looked down on the city________ .
 A. above                        B. beneath        C. over                  D. next
4. Our lives depend on _____ .
 A. electric           B. electricity                   C. electrically        D. electrical

5. Children _____ drink milk every day. It’s good for them.

A. ought not to     B. should                       C. don’t have to     D. must not

6. Speak louder _____ everybody can hear you.

A. because         B. so that                        C. as                     D. to

7. She wore a hat to _____ the sun out of her eyes.

A. make                          B. let’s                           C. get                    D. keep

8. He fell off his bicycle and injured himself.

A. hurt         B. destroyed                   C. cut                    D. pain

9. We’ll go swimming today ______ it’s hot.

A. so         B. because                       C. so that               D. then

10.The___________ put too much salt in the food.

A. cook           B. cooker                        C. stove                D. oven

ko có hình hả bn :<

3.A

4.B

5. B

mik nghĩ z :')

hiện tượng 2, 4

relaxing

boring

popular

wonderful

organization

a, CTHH: CaO

PTK_{Canxit oxit} = 40 + 16= 56đvC

b, CTHH: N₂

PTK_Nito = 14 . 2 = 28đvC

c, CTHH: NH₃

PTK_amoniac = 14 + 1.3 = 17đvC

d, CTHH: CuSO₄

PTKđồng sunfat  = 64 + 32 + 16.4 = 160đvC

e, CTHH: O₃

PTKozon = 16 . 3 = 48đvC

45. A: She really_____collecting coins.

B: It’s more than that. She is obsessed!

A. adores              B. dislikes                      C. hates                          D. detests

46. I can’t live without coffee. I’m so_____to it.

A. addict              B. addictive                             C. addicted           D. addiction

47. There are many reality shows, comedies and TV series nowadays because people

love_____TV.

A. to watch          B. watch            C. waches             D. watched

48. Liz wants to use her free time for helpful activities so she works as_____.

A. a volunteer                B. a fan           C. a teammate         D. a partner

49. She is always_____on something nice and cute even though they are useless.

A. addicted           B. interested               C. hooked             D. fallen

50. It_____him so many years to collect stamps. Now his collection is very large and valuable.

A. has taken       B. has spent           C. has waste                  D. has used