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Для гидрирования метаналя массой 204,6 г был взят водород объёмом (н.у) 133,952дм3. определите массу спирта, полученного в результате реакции
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решение во вложении https://ru-static.z-dn.net/files/dd4/cd7d61773182c41cd87d4bb070711ec5.jpg
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Автор:
muhammadyyp9 - 5 лет назад
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как перевести дробь 5/41 в десятичную дробь
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Предмет:
Математика -
Автор:
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помогите пожаааалуйста с переводом
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800,000 BC – 10,500 BC
This is the longest period in prehistory. It is also ... (1/ know) as the Stone Age due to the fact that the majority of tools ... (2/ use) by humans in this period were ... (3/ make) from stone. During this period the climate in Britain changed radically several times with large areas of land covered with thick ice during the coldest periods known as the Ice Ages. There were warm periods in between and humans came and went depending on the climate.
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10,500 BC – 4 000 BC
This period of prehistory marked the end of the last Ice Age. Humans returned to Britain as the climate got warmer and followed a hunter-gatherer life style ... (4/ move) around the landscape to find the best sources of seasonal food. Stone continued to be the main material for making tools. Small pieces of stone were set into wood to make spears and harpoons.
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4 000 BC – 2 400 BC
This is the period when farming was ... (5/ introduce) to Britain. People moved from a hunter-gather lifestyle to a life-style based on ... (6/ farm) ... (7/ domesticate) animals and ... (8/ grow) crops. Hunting and gathering continued – as it does today – with fishing and berry/fruit collecting. Stone continued to be the main material used to make tools though pottery began to appear especially pots for storing, cooking and eating food.
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2 400 BC - 800 BC
At the start of the Bronze Age copper started to be used as a material for making tools. This was quickly followed by bronze which is harder and better for making tools and household objects. Roundhouses began to be ... (9/ build) and there is evidence for the appearance of social elites and armed conflict.
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800 BC - AD 43
During this period iron emerged as a key material for making tools. Farming productivity increased and the population grew. Regional groups of people – often known as tribes – emerged. In the late Iron Age, there was ... (10/ grow) contact with the Roman empire which had extended to include Gaul (modern France).
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AD 43 - AD 411
In AD 43 England and Wales became part of the Roman province of Britannia. Modern Scotland was never fully ... (11/ conquer). By the end of the second century AD, Hadrian’s Wall was the northernmost frontier of the Roman Empire, whilst Ireland always remained outside. Roman rule finally came to an end in the early fifth century AD. Roman rule continued for the next 400 years after which the Anglo-Saxon period began in England.-
Предмет:
Английский язык -
Автор:
maren - 5 лет назад
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