buồn🙂 🤑 😓 🍝 🐿️ 🐿️ 🏫 🎁 🕹️ ☎️ 🇧🇼

https://api.bingbe.com:8443/api/user/avt/283649979553

mấy chế có thấy chất như nước cất ko?

😄

rảnh dữ ha

1.they listen to english every day

1 they don't listen to english every day

2. He play badminton every afternoon

2 He doesn't plays badminton every day

3. They play volleyball every mornining

3 They don't play volleyball every morning

4. He does home work every night 

4 He doesn't homework every night

5. He has breakfast at 6.30

5 He doesn't have breakfast at 6 . 30

6. I get up at 9.00 every morning 

6 I don't get up a 9.00 every morning

7. Mary and peter go to work every day

7 Mary and peter don't go to work every day 

8. We have dinner at 8 p.m

8 We don't have dinner at 8 p.m

9. My father reads books every week.

9 My father doesn't read book every week

1.they listen to english every day

=> They don't listen to english every day

=> Do they listen to english every day

2. He plays badminton every afternoon

=> He doesn't play badminton every afternoon

=> Does he play badminton every afternoon

3. They play volleyball every mornining

=> They don't play volleyball every mornining

=> Do they play volleyball every mornining

4. He does home work every night 

=> He doesn't do home work every night

=> Does he do home work everynight

5. He has breakfast at 6.30

=> He doesn't have breakfast at 6.30

=> Does he have breakfast at 6.30?

6. I get up at 9.00 every morning 

=> I don't get up at 9.00 every morning

=> Do you get up at 9.00 every morning?

7. Mary and peter go to work every day

=>  Mary and peter don't go to work every day

=> Do Mary and peter go to work every day?

8. We have dinner at 8 p.m

=>  We don't have dinner at 8 p.m

=> Do  you have dinner at 8 p.m?

9. My father reads books every week.

=> My father doesn't read books every week

=> Does your  father read books every week

1.They listen to english every day.

(-) They don't listen to english every day.

(?)Do they listen to english every day?

2. He plays badminton every afternoon.

(-)He does not play badminton every afternoon.

(?)Does he play badminton every afternoon?

3. They play volleyball every morning.

(-)They do not play volleyball every morning.

(?)Do they play volleyball every mornining?

4. He does home work every night .

(-) He does not do home work every night .

(?)Does he do home work every night ?

5. He has breakfast at 6.30

(-) He does not have breakfast at 6.30

(?) Does he have breakfast at 6.30?

6. I get up at 9.00 every morning .

(-) I do not get up at 9.00 every morning .

(?) Do you get up at 9.00 every morning? 

7. Mary and Peter go to work every day .

(-) Mary and Peter do not go to work every day.

(?) Do Mary and Peter go to work every day?

8. We have dinner at 8 p.m.

(-) We do not have dinner at 8 p.m

(?) Do you have dinner at 8 p.m?

9. My father reads books every week.

(-) My father does not read book every week

(?) Does your father read book every  week?

Đáp án:

A. Phương pháp sản xuất thức ăn thô.

Coi hỗn hợp gồm Na(a mol) ; O(b mol) và Ba

Bảo toàn nguyên tố : 

$n_{Ba} = n_{Ba(OH)_2} = \dfrac{20,52}{171} = 0,12(mol)$

Suy ra: 23a + 16b + 0,12.137 = 21,9(1)$

Bảo toàn e : 

$a + 0,12.2 = 2b + 0,05.2(2)$

Từ (1)(2) suy ra a = b = 0,14

$m_{NaOH} = 0,14.40 = 5,6(gam)$

công thức

mk ko chả lời

PP hay còn gọi là V₃  đó bạn

Hoặc gọi là động từ bất quy tắc ở cột 3 á

Học tốt~

Động từ quá khứ phân từ ( past pariple ) 

bn nhờ bn này giúp nek

bn ấy hc giỏi toán hơn mk

https://olm.vn/thanhvien/cuoidoi09081002

xl bn nha

mẫu mấy câu: 

\(a,x^4y^4+4\)

\(=\left(x^2y^2+2\right)^2-4x^2y^2\)(cái này hok lâu sẽ tự hiêur)

\(=\left(x^2y^2-2xy+2\right)\left(x^2y^2+2xy+2\right)\)

\(a,x^4-x^2+2x-1=x^4-\left(x^2-2x+1\right).\)

\(=x^4-\left(x-1\right)^2=\left(x^2-x+1\right)\left(x^2+x-1\right)\)

\(b,x^4+x^3+x^2+1=??\text{ xem lại đề tí đi bn}+x\text{ nữa mói lm đc}\)

\(c,x^3-4x^2+4x-1=x^2\left(x-1\right)-3x\left(x-1\right)+\left(x-1\right)\)

\(=\left(x-1\right)\left(x^2-3x+1\right)\)

1.

2.

Điều chế CuSO4 :

C1: 2Cu + O2 + 2H2SO4 --> 2CuSO4 +2H2O

C2: Cu + 2H2SO4(đ) --> CuSO4 + SO2 + 2H2O

Điều chế FeCl3

C1: 2Fe + 3Cl2 -to-> 2FeCl3

C2: 6FeSO4 + 3Cl2 --> 2FeCl3 + 2Fe2(SO4)3