a,
PTK: $3+31+16.4=98$
Axit photphoric: $H_3PO_4$
b,
PTK: $2+12+16.3=62$
Axit cacbonic: $H_2CO_3$
c,
PTK: $12$
Kim cương: $C$
d, (khí etilen nhé, axetilen chỉ có 2H)
PTK: $12.2+4=28$
Etilen: $C_2H_4$
Đáp án:
Giải thích các bước giải:
a) `KHHH: H_3PO_4`
`PTK: 3.1+31+16.4=98\ (đvC)`
b) `KHHH: H_2CO_3`
`PTK: 2.1+12+16.3=62\ (đvC)`
c) `KHHH: C`
`PTK: 12`
d) `KHHH: C_2H_4`
`PTK: 12.2+4.1=26\ (đvC)`
CẦN GẤP@!!!! II. Rewrite the following sentences using the given forms so that they retain their original meaning. 72. We couldn’t drive because of the fog. =>The fog prevented ______________________________________________________. 73. How long is it since they bought the house? =>When________________________________________________________________? 74. It was such a boring film that she fell asleep. =>The film was so ________________________________________________________. 75. The furniture was so expensive that I didn’t buy it. =>The furniture was too____________________________________________________. 76. She knows a lot more about it than I do. =>I don’t know __________________________________________________________. 77. Unless he phones immediately, he won’t get any information. =>If ___________________________________________________________________. 78. “I’m sorry I didn’t phone you earlier”, Jane said to you. =>Jane apologized ________________________________________________________. 79. "You'd better do morning exercise, Minh", said I. =>I advised _____________________________________________________________. 80. “Would you like to go with me to the market, Mai? ”- Ha said =>Ha invited ____________________________________________________________.
Ve kakashi trong naruto nha, ko leen mangj
Em còn đúng 10₫ này thôi ạ:(( Mng làm hộ em vớiii
vẽ cho mình anime nữ nha ^^ tô màu nha ưu tiên vẽ tay hơn
Giải phương trình `\sqrt{x^2+2x+3}=x^2+2x+11`
Nhanh nhessssssssssssssssssssss
vé bé Cain thành dạng anime ( gái , trai j cũng đc ) * ảnh mình bỏ dưới nha *
vẽ semi nhé :))) chơi vậy cho vui
Giải phương trình: `\sqrt{x^2+2x+3}=x^2-2x+11`
\(\left | x+3y \right |\leq 1\), \(\left | x-y \right |\leq 1\) . Tìm giá trị lớn nhất của A = \(\dfrac{2003}{2002}x^{2}+\dfrac{2002}{2003}y^{2}\). dùng bunhia nha thanks
Loga.vn - Cộng Đồng Luyện Thi Trực Tuyến