Hòa tan 21,1g hỗn hợp A gồm Zn và ZnO cần 200g dd HCl dư thu được dd B và thoát 4,48l khí (đktc). Tính C% các chất có trong dd B

Giúp mình vs ạ

À không, câu b sai đề rồi vì điện trở có hết r

a) Vì R₁ nt R₂ nên \(R_{tđ}=R_1+R_2=5+10=15\left(Ω\right)\)

b) Giữa 2 đầu điện trở R₁, R₂ hay cả 2?

\(H_2+SO_3\rightarrow H_2SO_4\)

\(Cu\left(OH\right)_2\underrightarrow{t^o}CuO+H_2O\)

\(CaO+2HCl\rightarrow CaCl_2+H_2O\)

\(CaCO_3+2NaOH\rightarrow Ca\left(OH\right)_2+Na_2CO_3\)

\(SO_2+H_2O\rightarrow H_2SO_3\)

\(Fe\left(OH\right)_2\underrightarrow{t^o}FeO+H_2O\)

\(MgO+2HCl\rightarrow MgCl_2+H_2O\)

Câu f) trùng câu d)

Though she's very young, she can knit a wool sweater.

CHOOSE THE CORRECT ANSWER TO EACH OF THE FOLLOWING QUESTION.

1. I usually help with....the dishwasher after meals.

A. Loading B. Having C. Catching D. Doing

2. Look! Minh....on stage. She looks so beautiful.

A. Sings B. Are singsing C. Sang D. Is singsing

3. I....a big breakfast with my family.

A. Have B. Make C. Set D. Clear

4. Hoa usually....charge of doing the washing-up in her family.

A. Is taking B. Take C. Will take D. Takes

5. In my family, my father always takes charge of doing the....lifting.

A. Strong B. Heavy C. Huge D. Hard

6. ......the rubbish in the early morning in a part of my daily routine.

A. Coming out B. Taking out C. Bringing out D. Bulling out

7. Our friends....for the fashion show now.

A. Is preparing B. Prepare C. Prepares D. Are preparing

8. I usually.....my younger sisters when my parents are away on busiess.

A. Take chager of B. Take care of C. Pick of D. Look for

9. I always dust the...before people come over.

A. Table B. Floor C. Door D. Furniture

10. Colin....of taking part in the robot competition.

A. Thinks B. Is thinking C. Think D. Are thingking

11. Joshua....to be very tired after doing the laundry and mopping the floor today.

A. Appear B. Are appearing C. Appears D. Is appearing

12. We....our relatives this month.

A. Is visiting B. Visit C. Visits D. Are visiting

13. .....is the most important male servant in a house, usually responsible for organizing the other servants.

A. Buttler B. Breadwinner C. Homemaker D. Househusband

14. I....why you like watching football games - it's very exciting!

A. Am seeing B. See C. Sees D. Is seeing

Tìm lời dẫn trong câu sau:

Người thông minh nghĩ mình đã chọn sai nên liền tìm một vị trí khác để đào.