Answer:
Only primary alcohols give symmetrical ethers and a mixture of products is obtained when different starting materials are used.
Explanation:
Preparation of symmetrical ethers proceed smoothly with primary alcohols between 110°c to 130°c. Use of secondary or tertiary alcohol leads to the formation of an alkene. Also a mixture of products is obtained with different starting materials which isn't the intended purpose.
Answer: Robots can upgrade digitally, store casts amount of information, be upgraded from time to time, never sleep or eat, they can be charged and give you vast amounts of information at request.
Explanation:
Flash cards can be a big help, especially if your trying to memorize dates and names. Also, even though your homeschooled doing notes is also probably the best thing you can do. Make sure you take detailed notes, or if your write shorthand notes to go back reorganize them so you understand it all. Good luck!
Alfred Wegener had two flaws with his initial hypothesis. They are as follows:
i) Gravitational forces of the moon and sun, and tidal forces act as the mechanism to move the continents across the globe.
ii) Larger and sturdier continents broke through thinner oceanic crust like boat cutting through a thin layer of sea ice.
<u>Explanation</u>:
Alfred Lothar Wegener was a great meteorologist and German polar researcher. He was commonly known for his <u>“theory of continental drift”.
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In this theory, they proposed an idea that the continents were slowly drifting around the Earth. Many researchers objected his view. But he provided many evidence to support his continental drift hypothesis.
Some of the evidences are: Continental jigsaw puzzle, Fossils match across the seas, Rock types and geologic features and Ancient Climates.
