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Is sand an element, a compound or a mixture?

For example, sand can contain different grain sizes and small colored particles. Some other examples of heterogeneous mixtures are blood, gravel and the combination of oil and vinegar.\nSand cannot be an element because an element consists of only one type of atom, such as the element potassium. Similarly, sand is not a compound. Compounds are substances composed of two or more elements that are held together by a bond. The components of a compound are also in a definite ratio. Some examples of compounds are sodium chloride and water.

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What type of bonding holds two or more water molecules together?

The oxygen region of a water molecule has a slightly negative charge, whereas the hydrogen portions of the molecule take on slightly positive charges. When the partial negative oxygen portion on one water molecule meets up with the partial positive hydrogen side of another water molecule, a weak bond forms. One water molecule can hydrogen bond to four other water molecules. A hydrogen bond is relatively weak, having only about 5 percent the strength of a covalent bond; however, numerous hydrogen bonds are actually quite strong. The hydrogen bonding of water gives it unique qualities.

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What is an unsaturated solution?

A solution is defined as having a solvent along with particles. The solvent that is present in a solution is generally always liquid, but can be made of gas. The particles that are in the solution make up the various chemical differences of the solution. Solute concentration is what dictates the amount of particles that are present in a solution. The concentration of the particles can change depending on the situation and can be affected by different factors, including temperature. Concentration can change when more particles are dissolved within the solution.Iced tea with sugar is a simple ex..

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What is nitrogen asphyxiation?

Nitrogen is a natural deoxygenizing agent. In areas that contain a large amount of nitrogen in the air, it replaces the oxygen and cannot be detected through smell, sight or taste. Nitrogen is unsafe to breath unless there is a necessary amount of oxygen present in the area.\nDue to the gas being difficult to detect, nitrogen asphyxiation may affect unknowing individuals, as it does not cause the painful effects of suffocation. Nitrogen asphyxiation prevents further intake of oxygen while the body continues to release carbon dioxide, and this may lead to unexpected health issues or death.

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What are some of the effects of global warming ?

Global warming is a gradual rise in the temperature of the Earth's atmosphere. Higher temperatures cause ice sources to melt at a faster rate. This includes the ice caps covering mountain tops and the blocks of sea ice found in polar regions. Increased melting rate means a quicker depletion of this source of fresh water.\nAs the ice melts, it flows into the sea and contributes to increases in the sea level. Global warming disturbs the balance of ecosystems by changing the salinity of ocean waters at estuaries. Fish and other organisms unable to adapt die or experience growth or reproducti..

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How many ounces of gold are in a karat?

In the United States, metal cannot be called gold unless the metal is at least 10 karat. An ounce of 10-karat gold contains 10 parts of gold out of 24 parts, or 41.7 percent gold. Therefore, an ounce of 10-karat gold contains 0.417 ounces of gold, as stated by About.com. Metals most commonly mixed with gold for jewelry include copper, zinc and silver. The ratio of other metals determines the color of the gold, as noted by the World Gold Council.

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What are the cold colors?

The relationship of colors and the separating of colors into warm and cold are part of a larger organization of colors called color theory. A tool called a color wheel is used within color theory to coordinate colors in a given space. Cold colors can create the illusion of space, so are effective in smaller rooms needing a larger feel. Soothing feelings of tranquility also are created by the use of cold colors, according to color theory. This makes cold colors excellent for hospitals, professional offices and areas of high anxiety or stress. Cold colors don't always have to stand alone in..

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What are some examples of vegetative propagation?

Plants reproduce sexually from seeds and spores as a means of promoting the offspring variability that can enable them to adapt better to their environment. The seed-generated plant combines parent traits in new and often unpredictable ways that may prove to be beneficial to the species' survival. However, this is not always a sought-after outcome in agriculture. Farmers producing desirable and profitable cash crops tend to prefer a new crop with the same characteristics as the previous one. When the cultivation of identical plants through vegetative propagation from a single parent plant..

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How is skin able to heal itself?

The body's immune system begins the real work of healing the wound, states MedlinePlus. The wound becomes pink, puffy and oozes a clear fluid to keep itself clean. Blood vessels also open up to get oxygen to the wound, and white blood cells gather to fight infection.\nHealing begins at the edges of the wound, explains Oswald. New skin slowly progresses toward the center until the wound is covered. When another layer of skin grows over the wound, the scab drops off. If the wound is shallow, it should not leave a scar. However, if the cut is deep, the body begins a process called cicatrisat..

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What are some examples of binary acids?

A binary compound or a binary solution is one that is comprised of two elements. A binary acid is a combination of two elements, one of which is an acidic nonmetal and the other element is hydrogen. Together these two elements create a binary acid, such as hydrosulphuric acid or hydroiodic acid. The strength of binary acids varies, and is dependent on the solvation of the acidic nonmetal in the compound. There are two classes of acids. One is binary acids, the other is oxoacids or oxiacids. Oxi acids, unlike binary acids, contain hydrogen, oxygen and an acidic element.

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