TL

còn số con chó là

15-3=12(con)

Đáp số 12 con chó

HT

0 con vì nó chết hết rồi

9,5

9(dư 1)

TL

=1

 nha

HT

= 1 bn nhé

Thank tick và kết bn

#dễ vẽ này

đây đc ko?

tổng góc toi + góc pxa = 90+30 =120

góc giua mat pxa va pnam ngang = 30+(180-120)/2 = 60^o

trang chr toán ko phải là vật lí bạn

Mik nhầm, 6 câu nha

4 hôn

5 trầm cảm

6 chúa hề 

thứ tự nè,   sunny, because, hot, fly, kite                                                                                                                                                                                                                                 

i dont suny,i windy,because it is hot and i can't fly my kite

Đó,đáp án đó

Nowaday, traffic problem is the biggest problem that many people care about. In VN, I think the city where have the worst traffic is Ha Noi. 
The first problem is the traffic jam here. Why? In the rush hours of the day, there're too many people using the road. Last year, in 2013, many bridges was built so it happen less but in order to stop this, a kind of small car should be invented, people should go to works by buses instead of going by motorbikes... 
The second one, as you know, the roads in VN is not as big and clean as the roads in the big countries. They're narrow, bumpy and some dirty so it’s really hard for the road users to drive safely. I think we should raise money to make the road in VN better and better. 
But everyone knows that Vietnamese people are not respect and don’t follow the traffic rules. That’s the biggest reason for everything. They wear the helmet that not strong enough to keep they safe if the accident may happen, they ride too fast on the small roads… The traffic will never can be improve if they keep doing this. 
At the end, I hope the traffic in VN will improve more.

I live in Vietnam and there are a lot of traffic problems in big cities in my country. Firstly, there are too many people using the roads especially in the rush hour when people run out to work and school or get home from those places. Secondly, there are too many vehicles on the road that leads to traffic jams. Another problem is that many roads are narrow and bumpy. Fourthly, there are traffic accidents every day so a lot of people lose their lives or are injured. So in order to travel on the roads safely, I think we should obey the traffic rules and traffic signs as well. Moreover, carefulness is very necessary.

VCl₂ giảm = VCl₂ phản ứng = 6,72 lít

=> nCl₂ = 6,72 : 22,4 = 0,3 mol

2M + nCl₂ \(\xrightarrow[]{t^o}\) 2MCl_n

 \(\dfrac{0,6}{n}\)  0,3

Bảo toàn khối lượng: mM = m muối - mCl₂ = 32,5 - 0,3.71 = 11,2g

=> M = \(\dfrac{11,2}{\dfrac{0,6}{n}}=\dfrac{56n}{3}\)

Do M là kim loại nên n nhận giá trị 1, 2, 3

Với n = 3 => M : Fe