Рассчитайте относительные молекулярные массы веществ и поставьте вместо звездочки знак больше или меньше M r (PH3) * M r (N2 O5)

Грузоподъёмность первого самосвала в 4 раза больше грузоподъёмности второго, а грузоподъёмность второго самосвала на 24т меньше первого. Найдите грузоподъёмность каждого самосвала

почему фотосинтез называют сложным и многоступенчатым процессом? какие условия необходимы для непрерывного процесса биосинтеза углеводов?

рассчитайте плотность сернистого газа по воздуху и по водороду

Переведите, пожалуйста, текст бес переводчиков.

         Many people think that caviar is the national food of Russian people. Caviar has become very expensive now.

         Some people eat pancakes with caviar, some of them like pancakes with sour cream or honey. I am not sure he is fond of sour cream.

         Do you know any intersting American customs?

         Traditions and interesting are different in Scotland, Wales and Northern Ireland.

         Is it going to snow? - I hope so.

         Is going to rain? - I hope not. Let's hope for the best.

         The 20th century is the century of science.

         When he was a student at Moscow University he was fond of science.

         A person who knows much about a science is a scientist. M. Lomonosov was a great Russian scientist. What famous British scientists do you know?

         S. Korolev's scientific theories and discoveries have changed a lot in the world of science.

         The planet Earth and everything and everyone on it are in space. Yuri Gagarin, the famous Russian cosmonaut, was the first man in the world to have a voyage in space.

         Yuri Gagarin made a space voyage around the world  on board the spaceship "Vostok" on the 12th of April, 1961.

         Who was the first man to walk in space? The Russian cosmonaut Alexey Leonov was.

         A village is a small group of houses in the country. James Cook, a great English discovered and travelling was born in a small village.