Предмет: Химия, автор: mixajlova2007

Рассчитайте массовые соотношения элементов в молекуле веществ СН4​

mixajlova2007: не в процентах

Ответы

Автор ответа: nyurossi
1

Ответ:

СН4

W(Э)= Аr×a/Mr

W(C)= 12×1/16=0,75 или 75%

W(H)= 1×4/16=0,25 или 25%

mixajlova2007: не в процентах
Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Математика, автор: лёха162
сколько будет 2 в корне умноженное на 3 десятых
1 год назад
Предмет: Английский язык, автор: 74nadin74
Перевод текста :
The British are known to be great sports-lovers, so when they are neither playing, nor watching games, they like to talk about them. Many of the games we play now have come from Britain. One of the most British games is cricket. It is often played in schools, colleges, universities and by club teams all over the country. Summer isn't summer without cricket. To many Englishmen cricket is both a game and a standard of behaviour. When they consider anything unfair, they sometimes say: "That isn't cricket." But as almost everywhere else in the world, the game which attracts the greatest attention is Association football, or soccer. Every Saturday from late August till the beginning of May, large crowds of people support their favourite sides in football grounds. True fans will travel from one end of the country to the other to see their team play. There are plenty of professional and amateur soccer clubs all over Britain. International football matches and the Cup Finals take place at Wembley. Rugby football is also very popular, but it is played mainly by amateurs. Next to football, the chief spectator sport in British life is horse-racing. A lot of people are interested in the races and risk money on the horse which they think will win. The Derby is perhaps the most famous single sporting event in the whole world. Britain is also famous for motor-car racing, dog-racing, boat-racing, and even races for donkeys. The famous boat-race between the teams of Oxford and Cambridge attracts large crowds of people. A great number of people play and watch tennis. Tennis tournaments at Wimbledon are known all over the world. The innumerable tennis courts of Britain are occupied by people between the ages of 16 and 60 who show every degree of skill — from practically helpless to the extremely able.
1 год назад
Предмет: Математика, автор: Вован1234567
Запишите периодическую дробь в виде обыкновенной 5,(05). Пожалуйста!!!.
1 год назад
Предмет: Русский язык, автор: eralinotebook
БерёзаЕсли б дали берёзе расчёску,Изменила б берёза причёску:В речку, как в зеркало, глядя,Расчесала б кудрявые пряди,И вошло б у неё в привычкуПо утрам заплетать косичку.
7 лет назад
Предмет: Алгебра, автор: aitagurieva
ПОМОГИТЕ ПОЖАЛУЙСТА!!!!
7 лет назад