37. What is the price of the bicycle? (How much)

=> How much does the bicycle costs?

38. The tea doesn't taste the same as the one I usually drink. (from)

=> The tea tastes diferrently from the one I usually drink.

39. I really like listening to pop ballad songs. (fond)

=> I'm really fond of listening to pop ballad songs.

40. I want some iced tea because I am hot. (so)

=> I am hot so I want some iced tea.

37 How much is the bicycle?

38 This tea tastes different from the one I usually drink

39 I am really fond of pop ballad sóng

40 I am hot so I want some iced tea

A

A

A

a: Xét ΔBAC có 

D là trung điểm của AB

M là trung điểm của AC

Do đó: DM là đường trung bình của ΔABC

Suy ra: DM//BC và \(DM=\dfrac{BC}{2}=3.5\left(cm\right)\)

Bài 1: \(n_{CuO}=\dfrac{3,2}{80}=0,04\left(mol\right)\)

\(CuO+H_2SO_4\rightarrow CuSO_4+H_2O\)

0,04  →  0,04

\(\Rightarrow m_{H_2SO_4}=0,04\cdot98=3,92\left(g\right)\)

\(\Rightarrow C\%_{H_2SO_4}=\dfrac{3,92}{80}\cdot100\%=4,9\%\)

Bài 2: \(n_{HCl}=0,2\cdot2=0,4\left(mol\right)\)

\(Fe_2O_3+6HCl\rightarrow2FeCl_3+3H_2\uparrow\)

\(\dfrac{1}{15}\)     ←    0,4

\(\Rightarrow m_{Fe_2O_3}=\dfrac{1}{15}\cdot160=\dfrac{32}{3}\left(g\right)\)