PTHH: 2Al + 6HCl → 2AlCl₃ + 3H₂

PTHH: Mg(OH)₂ + 2HCl → MgCl₂ + 2H₂O

PTHH: Fe₂O₃ + 6HCl → 2FeCl₃ + 3H₂O

PTHH: K₂O + 2HCl → 2KCl + H₂O

Lần sau em đăng câu hỏi đúng box để mọi người hỗ trợ nha

PTHH: 2Al + 6HCl → 2AlCl₃ + 3H₂

PTHH: Mg(OH)₂ + 2HCl → MgCl₂ + 2H₂O

PTHH: Fe₂O₃ + 6HCl → 2FeCl₃ + 3H₂O

PTHH: K₂O + 2HCl → 2KCl + H₂O

Tóm tắt
s = 32 km
s₁ = 4km
t₂ = 0,5 giờ
a) s₂ = ? km
b) v₂ = ? km/h
                             Giải
a) Quãng đường người đó đi xe máy là:
         s₂ = s-s₁ = 32-4=28 (km)
b) Vận tốc xe máy là:
         v₂ = s₂/t₂ = 28/0,5 = 14 (km/h)
Vậy...

1 knowing the answer, they told us

2 the unique handicraft, we didn't like it

3 We looked into these machines so that we could find out the method 

We looked into these machines so as to find out the method 

4 Jack's poverty, everyone looks up to him

5 In order to choose the best chair, Linda looked through this catalouge 

6 is not as dirty as this one

7 I didn't play as successfully as Linda

8 A dog can't run as fast as a horse

A dog runs more slowly than a horse

9 No rivers in the world is as long as the Nile

10 No one in my family talks as politely as Linda

a)

=15(can6-1)/(6-1)+4/(4-2)-12/(3-4)

=3(can6-1)+2+12

=3\(\sqrt{6}\)-3+2+12

=17+3can6

các câu còn lại tương tự liên hợp mẫu 

c: Ta có: \(\dfrac{3+2\sqrt{3}}{\sqrt{3}}+\dfrac{2+\sqrt{2}}{\sqrt{2}+1}-\left(2+\sqrt{3}\right)\)

\(=2+\sqrt{3}+\sqrt{2}-2-\sqrt{3}\)

\(=\sqrt{2}\)

Bài 3:

Áp dụng tc dtsnb:

\(\dfrac{x}{5}=\dfrac{y}{3}=\dfrac{z}{4}=\dfrac{x+2y-z}{5+3\cdot2-4}=\dfrac{63}{7}=9\\ \Rightarrow\left\{{}\begin{matrix}x=45\\y=27\\z=36\end{matrix}\right.\)

giúp mình vs