1.43x7/31x7=301/217

   59x13/7x13=767/217

=>767/217>301/217

hay59/13>43/31

2.rút gọn -48/224 còn -3/14

rút gọn -52/247 còn -4/19

-3/14=-3x19/14x19=-57/266

-4/19=-4x14/19x14=-56/266

=>-57/266<-56/266

hay-48/244<-52/247

vậy...

\(n_{CO_2}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\)

PTHH: CaCO₃ --t^o--> CaO + CO₂

__________________0,1<--0,1

=> m_CaO = 0,1.56 = 5,6 (g)

1 A

2 B

3 C

4 A

5 D

6 D

7 A

8 B

Lời giải:
$22+23-25+27-29+31-33$

$=22+(23-25)+(27-29)+(31-33)$

$=22+(-2)+(-2)+(-2)=22+(-2).3=22-6=16$

a,<

b,>

c,>

d,<

a     <

b        >

c      >

d      <

42:y=6

     y=42:6=7

Vậy giá trị thích hợp để 42:y=6 là 7

Hok tốt!

42 : y = 6

       y = 42 : 6

       y = 7

@Bảo

#Cafe

42:y=6

      y=42:6

      y=7

the summer is very Beautiful

Câu : This summer 2017 is very hot .

Câu hỏi : What is the weather in summer 2017 ?

Ai giúp mình với! Đang cần gấp hạn nộp là mai rồi các bạn giải thì kèm theo giải thích hộ mifng với cô bắt giải thích!!!!                                              

Exercise 1: Find the word which has a different sound in the part underlined

Exercise 2: Put the verb in brackets in the correct verb form

1.  I (see)___will see___ a film this Sunday evening. (you/ go) __Will you go___ with me?

2. They (give)___will give__a party next week.

3. The members of the stamp collectors’ club (meet)__will meet____ at the library next Friday.

4. (you/ be)____You will be____ free next Sunday.

5. We (live)___live___ near Nam’s house, but we (not see)___don't see____him very often.

6. Don’t worry. I (go)__will go____fishing with you next Saturday morning.