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hannahrasco4051
03.02.2020 •
Chemistry
Explain how the energy changes on a rollercoaster between potential energy and kinetic energy?
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Ответ:
When the roller coaster is going up the hill, the potential energy (stored energy) is increasing and once at the top of the hill the potential energy is at its highest point becuase the velocity Is almost zero. Once the rollercoaster falls and speeds down the hill, the potential energy is converting to kinetic energy because of the movement. Kinetic energy is moving energy and potential energy is stored energy.
Ответ:
Synthesis
Mercury(I) iodide can be prepared by directly reacting mercury and iodine.
Structure
In common with other Hg(I) (mercurous) compounds which contain linear X-Hg-Hg-X units, Hg2I2 contains linear IHg2I units with an Hg-Hg bond length of 272 pm (Hg-Hg in the metal is 300 pm) and an Hg-I bond length of 268 pm.[1] The overall coordination of each Hg atom is octahedral as it has in addition to the two nearest neighbours there are four other I atoms at 351 pm. [1]The compound is often formulated as Hg22+ 2I−.[2]
Historical Uses
Mercury(I) iodide was a commonly used as a drug in the 19th century, sometimes under the contemporary name of 'protiodide of mercury'. It was used to treat a wide range of conditions; everything from acne to kidney disease and in particular was the treatment of choice for syphilis. It was available over the counter at any drugstore in the world, the most common form being a concoction of protiodide, licorice, glycerin and marshmallow.[citation needed]
Taken orally, and in low doses, protiodide causes excessive salivation, fetid breath, spongy and bleeding gums and sore teeth. Excessive use or an overdose causes physical weakness, loss of teeth, hemolysing (destruction of the red blood cells) of the blood and necrosis of the bones and tissues of the body. Early signs of an overdose or excessive use are muscular tremors, chorea, and locomotor ataxia. Violent bloody vomiting and voiding also occur.
Protiodide is banned as a medication, even though it persisted in use as a quack remedy until the early 20th century.
Explanation: