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Diana - the People's Princess
Diana Spencer was born on the first of July 1961 in England. She had two older sisters and a younger brother. In childhood she liked games, swimming, running and dancing. She wanted to become a dancer. Besides she loved children very much and at the age of sixteen she worked in schools for very young children.
Diana became princess, when Prince Charles, the Queen's son, asked her to be his wife and they got married. They seemed to be a happy couple at first. They had two sons. They travelled a lot they worked a lot, they visited many countries together. But Diana was not quite happy because they did different things and Charles didn't understand her.
Why was Diana the most famous, the most beautiful, the most photographed woman in the world?
Why did she win the hearts of millions and millions of people in many countries? Why did so many people come to London to remember her when she died? Why did the car accident which took her life, become such a total shock to crowds of people? Why did people feel the need to be in London at the funeral?
Why did the tears and love at the funeral move the world?
The answer is so simple. Matthew Wall, a student at St. Michael's College in Burlington said: "She was such a lovely lady. She did so much for those people less fortunate that herself".
She was a kind woman. Hundreds of people talked about Diana's kindnesses. She liked ordinary people, though she was rich and had many rich friends. Wherever she was, she was always ready to lend a hand. She was devoted to the sick and the poor. She visited hospitals for people with AIDS and for lepers and wasn't afraid to touch them, talk to them, listen to them.
She worked on children's charities, and had teamed up with Hillary Clinton in an effort to ban landmines. And it's not only money, that she wanted to give people. She wanted to give them a part of her soul, to make them happy because she was unhappy herself. She wanted to give them love, because she needed love herself.
Rock stars (Sting, Elton John), pop singer George Michael, film stars and producers (Tom Hanks, Steven Spilberg, Nicole Kidman, Tom Cruise) and other famous people were among her friends. But she had more friends among ordinary people.
Diana was seen many times in floods of tears, because of the pressures of her loveless 15-year marriage. It is not a secret that Diana was hounded and humiliated to the point of mental breakdown and was able to pull through only because she knew she had the love of the people to buoy her in her darkest hours.
She was, indeed, the People's Princess.
1) ответь на во
Дано: m(розчину)= 300 г; ω(речовини)=0,02 або 2%.
Знайти: m(речовини)-?
Розв'язання:
б.
З формули ω(речовини)=m(речовини)/m(розчину) знаходимо
m(речовини)=ω(речовини)•m(розчину)
m(речовини)=0,02 • 300 г = 6 г.
б.
Складемо пропорцію і розв'яжемо її для обчислення маси речовини.
Те, що масова частка речовини рівна 2% означає, що
у 100 г розчину міститься 2 г речовини, тоді
у 300 г розчину буде міститися х г речовини.
100 г / 300 г = 2 г / х г, звідси
х • 100 г = 2 г • 300 г,
х = 2 г • 300 г / 100 г = 6 г.
Відповідь: m(речовини) = 6 г.
2Cu + O2 = 2CuO( из двух простых веществ получается одно бинарное(сложное) вещество, реакция соединения)
Медь повышает свою степень окисления с 0 до -2, является восстановителем, значит-отдаёт электроны
Cu(0) -2é Cu(2+)
Кислород понижает свою степень окисления с 0 до -2, то есть является окислителем, значит-принимает электроны
O2 -4é 2O(-2)
Ставим 2 перед кислородом в правый части, те слева его два
Теперь перемножаем крест накрест
Cu(0) -2é Cu(2+)/ • 4
O2 -4é 2O(-2)/ •2
И четыре, и два делятся на 2, сокращаем и получаем что перед каждой медью надо поставить двойку
Сумма коэффициентов: перед медью в левой части стоит 2, перед оксидов меди в правой части тоже стоит двойка, перед кислородом ничего не стоит, но на самом деле там коэффициент 1, мы его просто никогда не пишем.
Значит сумма равна 2+2+1=5