Science

Refine Search

What type of chemical change is rusting?

Iron rusts when it comes in contact with oxygen or water, according to the Franklin Institute. Iron and oxygen combine to form iron oxide, or rust, using the chemical formula 4Fe + 3O2 = 2Fe2O3. Oxidation, or loss of electrons, occurs when oxygen molecules react with iron and remove electrons from the iron. The electrons lost from the iron travel through water. The presence of salt increases the rate in which the iron rusts because the salt increases the conductivity. This in turn allows electrons to travel through water more quickly.

Continue Reading

What are four ways bacteria can be helpful to humans?

Bacteria in the intestinal tract helps the body to digest food. The production of several foods, such as cheeses, sausage and sauerkraut, depend upon bacteria or fermenting bacteria in order to reach their finished states. Harmless bacteria is used to treat some bacterial infections in the human body by interfering with the colonization of the harmful bacteria. Hydrocarbon-oxidizing bacterias aid in the decomposition of petroleum, and they are used by industry when cleaning oil spills.

Continue Reading

What is the formula for mercuric acetate?

Mercuric acetate has a solubility in water of 25 grams per 100 milliliters at 10 degrees Celsius. It is used for the mercuration of arenes. It also participates in a sequence of reactions called the oxymercuration-demercuration of alkenes, which results in the addition of a hydroxy group, OH-, and a hydrogen atom along the double bond.

Continue Reading

What personality traits are associated with an AB positive blood type?

Most type ABs are known as "intuitive and spiritual, with an ability to look beyond the rigid confines of society," explains Dr. D'Adamo. ABs want to be liked by their community but feel very strongly about their beliefs. At times, this clash of passion and wanting to be accepted can create internal and external conflict.\nType AB is one of the rarest blood types with less than 5 percent of the population having this type. Additionally, AB is the only type to have been created genetically by breeding and not the environment. There is a health movement that believes a person should eat bas..

Continue Reading

What causes oil spills?

The Exxon Valdez Oil Spill Trustee Council lists several reasons that this tanker ran aground in March 1989. They are all acts of carelessness or human mistakes. While tests showed the captain of the Valdez to have alcohol in his system several hours after the accident, the state of Alaska found him not guilty of operating the vessel under the influence of alcohol.\nAs oil floats on the ocean, it spreads rapidly across the surface to form an oil slick. Eventually, it spreads to form a very thin layer, known as a sheen, with a rainbow-like appearance. Oil spills are harmful to fish, shellfish, ..

Continue Reading

What is the compound name of BaS?

Barium sulfide is extremely poisonous; it forms the toxic gas hydrogen sulfide when exposed to water. Exposure to this gas can be fatal.\nBarium sulfide has a molar mass of 169.39 grams per mole and a melting point of 1200 degrees Celsius. Barium sulfide is synthesized using a carbothermic reaction, which reduces barium sulfate to barium sulfide, releasing carbon dioxide gas in the process. This inorganic compound is used as a precursor for synthesizing several barium-containing products. These products include the pigment lithopone and many others.

Continue Reading

What factors play a role in separating pigments with paper chromatography?

Paper chromatography is a common method, and it sets out to separate the different pigments that make up a specific ink or dye. Chromatography paper is always pure white in color so that it does not taint the ink samples. Solvents make their way up the paper and the different pigments in the ink or dye travel at different speeds. Once the process is complete, there will be spots of ink of the paper showing the different colors that make up the ink.

Continue Reading

What is a basic solution in chemistry?

The strength of a basic solution, indicated by how far above the pH level of the solution is above 7, is determined by the strength of the base used. A strong base will almost fully dissociate into its component ions, leading to a higher concentration of hydroxide ions. Basic solutions can be formed by mixing a high amount of a base with a small amount of an acid.

Continue Reading

What is the composition of the thermosphere?

Gases below the thermosphere contain different types of molecules and atoms which are bound and mixed together by turbulence. However, frequent collisions are not common in the thermosphere as gases in this region are broken apart by X-ray and ultraviolet photons from the sun. These high-energy photons strip gas particles of their electrons, which creates an electrically-charged region of molecules and atoms.\nThe thermosphere absorbs the bulk of UV and X-ray radiation from the sun, which cause temperatures to rise. Temperatures in the thermosphere vary based on location within the region and ..

Continue Reading

What is elastic energy?

Reversibility is the key to how elastic energy is stored and released. When force is applied to an elastic material, energy is transferred into the material, and then by yielding that energy to the surroundings, the object can return to its original shape. All materials have a certain point at which the force is too great, causing the material to break or irreversibly altering its internal structure. Elastic energy is potential energy and is stored by changing the inter-atomic distances between nuclei.\nThermal energy is the randomized distribution of kinetic energy within a material, which ca..

Continue Reading
Showing 2441 to 2450 of 10000 (1000 Pages)