đề sai ko bạn

bạn đăng bài ktra lên hỏi à?

bài dễ mà sao không chịu khó làm vậy

A

b) Gọi công thức hóa học X là: KxNyOz

Ta có: x.NTKk/phần trăm của kali

x.NTKn/phần trăm của nitơ

x.NTKo/phần trăm của oxi

(tính từng cái rồi lm như sau: kqua=85/100)

(nhân chéo rồi lấy kq lớn hơn chia cho kq bé hơn nhé)

(/ là phân số nhé) 

rồi viết cthh ra là đc nhé bạn

mk ko biết viết latex nên khó diễn đạt

Good luck:))

a) x=1

    y=2

    a=?                   (x,y là chỉ số; a,b là hóa trị)

    b=I

áp dụng quy tắc hóa trị ta có:

x.a=y.b

1.a=2.1

=>2.1:1

=>I

Vậy Ca có hóa trị I

thank you, i will fix the holes in the next post

ib anh nhé!

Thik nek! Làm thoi:>

I think this position should be given to young people. On the one hand, there are many reasons why it is said that old people can make good leaders. Perhaps the first reason is that because older people often accumulate a large amount of professional knowledge and practical experience over many years of work, they are able to make better decisions. It is clear that today's business environment changes rapidly and it is difficult for young people with little experience to deal with unexpected situations. Another reason is that people seem to be more respected by others and have a stronger voice. As a result, employees tend to be more obedient and they will easily run the company's operations. However, on the other hand, I think hiring young people to be managers seems to be a better choice for the companies. the company. Firstly, creative ideas and innovative concepts, which are often lacking in long-term employees, will contribute significantly to the company's prosperity, in some cases even important factors. It seems that young people are stronger and so they are better able to take on big responsibilities and work under pressure than older people. With increasingly fierce competition, a leader needs to deal with many tasks and the elderly may not be able to do it due to health reasons. In short, although I admit that the elderly have can become good leaders, I think young people hold leadership positions.