Cho biết nguyên tử khối của H, S, O lần lượt là 1, 32, 16 đvC. Axit sunfuric có công thức hóa học dạng H₂S_xO₄ và có phân tử khối bằng 98 đvC. Giá trị của x và công thức hóa học của axit là

Kim loại M có hidroxit tương ứng là M(OH)₃. Phân tử khối của oxit kim loại tạo bởi M và oxi là 102 đvC. Nguyên tử khối của M là

Dựa vào đấu hiệu nào để phân biệt phân tử của đơn chất và phân tử của hợp chất?

The world of sports is a multimillion dollar industry. Around the globe, people flock to sporting events or watch their favourite teams faithfully each week on television. As a result, professional sports athletes receive huge salaries – well above, for example, those of doctors, lawyers, teachers or social workers. There is some debate about whether such outrageously high salaries are justified.

On the one hand, sport is viewed as a professional career, in which the top players should rightly earn high salaries. Athletes train rigorously from an early age to become peak performers in their field. They face tremendous pressure in each and every game, match or competition. Their personal lives are compromised and they lose all privacy. At the same time, their strong achievements bring honour and attention, not only to themselves, but also to their teams, schools, cities or countries.

On the other hand, various professions contribute to making our world run smoothly. Doctors put in at least ten years of grueling study and internship; their work saves lives. Teachers educate and inspire young people to be responsible citizens: their efforts produce the citizens of tomorrow. Social workers rescue individuals facing physical, mental and psychological challenges: their intervention creates safer societies.

Yet, professionals in the fields above usually struggle to get by, despite their meaningful and critical contribution to the world.

In my view, paying enormous salaries to sportspeople is unnecessary. We need to reconsider our social priorities and eliminate the great disparity in income received by diverse professionals. By doing so, we can build societies in which each one feels valued, appreciated and appropriately compensated for their own vocation or specialization.

-Mọi người nêu nội dung của bài này được không ạ ?