Lop 6 hien tai don va hien tai tiep dien

\(\frac{3}{4}=\frac{3\times4}{4\times4}=\frac{3\times5}{4\times5}=\frac{3\times6}{4\times6}=...=\frac{3\times24}{4\times24}=\frac{72}{96}\)

Vậy để các phân số có thử và mẫu đều là số có 2 chữ số và bằng phân số 3/4 thì có tất cả:

(24 - 4):1+1=21 (phân số)

Vào zuni nhé :D

The nurse uses the scale to weigh me.

1, Da Lat is a good place to visit. Da Lat has many beautiful flowers, colorful sight. People live in Da Lat are very friendly.

  My name is Linda Black . I'm forty - eight years (1) old and this is my plan when I reatire . Well , when I retire , I'm going to (2) learn Vietnamese .I can a lready speak French , Italian , and German and I want to learn (3) another language . I'm also going to learn to drive . I never had time to learn (4) when  I was younger . Then I'm going to buy a car a tent and travel all (5) over the work . I'm not going to wear boring clothes . I'm tired (6) of blouses and skirts . I'm going to (7) sell jeans and tracksuits all the time And when I come (8) home from my travels . I'm going to (9) buy a book and become a TV star and tell everyone about the places I (10) visited and the people I met.

trời ơi mê tín thế

1. I am not saying he is honest ,but he is not good with money. (honest)
 

1,

a, \(CO_2+Ca\left(OH\right)_2\rightarrow CaCO_3+H_2O\)

b, \(n_{CO_2}=\frac{V}{22.4}=\frac{3.36}{22.4}=0.15\left(mol\right)\)

    \(n_{Ca\left(OH\right)_2}=V\times C_M=0.4\times1=0.4\left(mol\right)\)

 Ta có tỉ lệ \(n_{CO_2}< n_{Ca\left(OH\right)_2}\) nên ta tính theo số mol của CO₂

\(CO_2+Ca\left(OH\right)_2\rightarrow CaCO_3+H_2O\)

0.15       0.15               0.15         0.15    (mol)

Khối lượng Ca(OH)₂ dư là \(m_{Ca\left(OH\right)_2du}=n_{du}\times M=\left(0.4-0.15\right)\times74=18.5\left(g\right)\)

c, \(C_{MCaCO_3}=\frac{n}{V}=\frac{0.15}{0.4}=\frac{3}{8}\left(M\right)\)

   \(C_{MCa\left(OH\right)_2du}=\frac{n}{V}=\frac{0.4-0.15}{0.4}=\frac{5}{8}\left(M\right)\)

1. A.start                B.marry                 C. partner                  D. party 

2. A.phones           B.streets                C.books                     D. dates

3. A.April                B.apple                  C.date                       D.name

4. A.good               B.book                   C.moon                     D.look

5. A.lives                B.parents                C.things                    D.girls