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What is the normal phase of silicon?

Silicon is the second most abundant element in the Earth's crust. Scientists see evidence of silicon in the sun and stars. In its elemental form, it is relatively stable, but reacts with both metals and nonmetals. It does not exist in a pure state in nature. Silicon dioxide is the primary ingredient in sand and quartz.\nThe element silicon is important to plant and animal life. Diatoms use the silicon they extract from the water in which they live to form their cell walls. The element is a part of the ashes of plants and the skeletons of animals. The production of steel requires the use o..

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Does vinegar conduct electricity?

Distilled water conducts no electricity because the ions have been removed from the water. The addition of salt to the water increases the sodium ions in the water, which conduct electricity well. Both vinegar and ammonia have very few ions to carry an electrical charge, so very little electricity is conducted. However, when mixed together, the two liquids react with each other releasing ions, and the resulting solution becomes a very good electrical conductor.

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Why do eyebrows disappear?

Eyebrow loss is known as madarosis and may also result in scarring of the skin. Dermatitis, psoriasis and rosacea may all include eyelid inflammation that can result in the loss of the eyebrows, informs the International Journal of Trichology. Eyebrow hair is also affected at the follicular level by certain systemic disorders, including hypothyroidism, alopecia and lupus. Madarosis occurs in the presence of certain infections in addition to leprosy and as a side effect of the use of certain drugs. Individuals experiencing these symptoms should consult with a physician to determine the underlyi..

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What is calcium nitrite?

Calcium nitrite has a chemical formula Ca(NO2)2 and a molecular weight of 132.089 g/mol. It's made by reacting hydrated lime with nitrogen oxides (NOx) gas. As is the case in all nitrites, nitrogen in calcium nitrite is in a +3 oxidation state. At room temperature, calcium nitrite is an odorless white or light yellowish powder. It's also hygroscopic, well soluble in water and generates light yellow toxic solution.

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Does the human body makes its own vitamin D-3?

Vitamin D-3 forms when 7-dehydrocholesterol is exposed to enough ultraviolet B light. The amount of vitamin D-3 that forms depends on the person's age, skin color, clothing and whether or not she's wearing sunscreen. The time of year and the latitude also determine how much vitamin D-3 a person makes. Although it's possible to get too little vitamin D-3 from UVB light, spending a long time in the light doesn't result in vitamin D toxicity.

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To which family does vanadium belong?

Vanadium takes its name from the Scandinavian goddess of beauty, Vanadis, who was also known as Freya. It was discovered by the Mexican chemist Andrés Manuel del Rio in 1801. Vanadium does not corrode and is a component of pipes and tubes used by the chemical industry. Its most practical compound is vanadium pentoxide, which is used in ceramic catalysts and to fix dyes to fabric. \nVanadium has an atomic symbol V and an atomic number 23.

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When do men stop growing?

A male's growth spurts begins in the extremities. Arms, hands, legs and feet grow faster than other body parts, which negatively impacts coordination. Teen boys sometimes seem clumsy, but they are just trying to adjust to the new sizes. The trouble lessens as the rest of the body starts to grow, as well. During adolescence, boys undergo a tremendous number of body changes in addition to becoming taller and heavier. Body hair begins to appear, first in the pubic region, then under the arms and on the face. A boy's larynx grows, and his vocal chords lengthen. This results in the ordina..

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What countries are affected by acid rain?

Acid rain contains high levels of sulfuric and nitric acids. It occurs in different forms of precipitation, such as snow, fog, rain and dry materials. Most acid rain is a direct result of pollutants released into the atmosphere from human activity. Conservation efforts, such as finding alternative sources of energy, are in place to protect the environment and reduce the damage caused by humans.

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What is the purpose of fat in the body?

Fats are organic compounds composed of hydrogen, oxygen and carbon, and they are found in liquid or solid form, as explained by the New York Times. Fats contain a combination of saturated and unsaturated fatty acids. The three nutrients that provide calories to the body are fats, proteins and carbohydrates. Fats supply 9 calories per gram, which is much more than the calories provided by protein and carbohydrates. They also provide linoleic and linolenic acid, the essential fatty acids that the body cannot create and must acquire from food. These fatty acids play a key role in controlling bloo..

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How can acid rain be reduced?

Transportation contributes most to acid rain pollution because automobiles depend on fossil fuels. Therefore, opting to use public transport, riding bicycles and walking, when possible, reduces fossil fuel emissions and acid rain. Alternative energy sources available for the transport industry include fuel cells, batteries and natural gas. Renewable energy technologies, such as solar, water and wind energy systems also reduce acid rain. Environmental benefits and costs should be considered in the choice of alternative energy sources. Geothermal, solar and wind energy systems have not become ec..

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