M là dung dịch chứa 0,8 mol HCl. N là dung dịch chứa hỗn hợp 0,2 mol Na2CO3 và 0,5 mol NaHCO3. Đổ rất từ từ N vào M cho đến hết thu được V lít khí CO2 ở đktc. Giá trị của V bằng

Chứng Minh Rằng : P = $ 369 ^ 3 $ ` - ` $ 219 ^ 3 $ chia hết cho ` 1350 ` P = $ 372 ^ 3 $ ` - ` $ 128 ^ 3 $ chia hết cho ` 8000 `

lm dùm e vs mng e thật sự cần gấp, cảm ơn mng trc và hứa vote 5 sao

Tính nhanh: a, 10000 - 47 x 74 - 47 x 26 b, 3457 - 27 x 48 - 48 x 73 + 6543

Cái chết của cô bé bán diêm và kết thúc truyên gợi cho em điều gi?

chia đa thức một biến đã đc sắp xếp c,(4x^3-3x^2+1) : (x^2+2x-1)

Task 2. Write the negative (-) and interrogative form (?) of the following sentences. 1. He loves to play basketball. ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ 2. He thinks he is very handsome. ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ 3. We generally sing songs all together. ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ 4. It rains here in the summer. ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ 5. I study German on Monday. ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ 6. My daughter does the laundry. ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ 7. We see them every week. ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ 8. Jared sleeps in the afternoon. ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ 9. Karen and George brush their teeth twice a day. ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ 10. That house is on the other side of the street. ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________

Tính nhanh: a, 8 x 427 x 3 + 6 x 573 x 4 b, 6 x 1235 x 20 - 5 x 235 x 24 c, (145 x 99 +145) - 143 x 101 - 143 d, 54 x 47 - 47 x 53 - 20 - 27

Tính nhanh: a, 4 x 125 x 25 x 8 b, 2 x 8 x 50 x 25 x 125 c, 2 x 3 x 4 x 5 x 50 x 25 d, 25 x 20 x 125 x 8 - 8 x 20 x 5 x 125

Nhau thai có chức năng gì trong thời gian mang thai?