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Why does stirring affect the rate of dissolving?

When performing a solubility experiment, using a stirring stick to move the solvent around the solute causes fresh portions of the solvent to come into contact with the liquid, which in turn makes it dissolve faster. There are other factors that affect a solvent's solubility as well:Liquids act on the solvent's surface The smaller the surface area is, the easier it is to dissolve. Therefore, grinding a substance down into smaller particles makes it easier to dissolve.Heating the solution causes the solvent to dissolve faster However, gasses become less soluble when the temperature in..

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Which animals reproduce asexually?

Since asexual reproduction does not involve the exchange of genetic information, the offspring produced from this method of reproduction are essentially clones of their parents. Offspring, in addition to being genetically identical to their parents, are identical to one another as well. Asexual reproduction is more commonly found in plants, and may take place in several ways. Most plants that perform asexual reproduction have within their bodies male and female organelles. Similarly, a few animal species have this characteristic too. In starfish, reproduction takes place primarily through fiss..

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What is the product of Sn and HCl?

SnCl2 is the chemical formula for tin(II) chloride, and SnCl4 is the chemical symbol for tin(IV) chloride. The resulting product depends on the charge on the tin from the left side of the equation. The balanced equation for each reaction is written as Sn + 4 HCl = 2 H2 + SnCl4 for tin(IV) chloride and as Sn + 2 HCl = H2 + SnCl2 for tin(II) chloride.

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What is the composition of talc?

Talc deposits frequently occur in the metamorphic rocks located along convergent plate boundaries. Talc forms when water containing dissolved magnesium and silica is heated and begins to react with dolomitic marbles. Minerals such as serpentinite or dunite, that have been altered by chemical active fluids and thermal energy, may also form talc. Talc is a translucent mineral that may appear white, gray, green or brown in color.

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How do you read a ruler in inches?

Inch lines on a ruler are typically the longest black lines on the ruler, and they have integer numbers next to these lines. To determine whether a ruler's increments are divided into fourths, eighths, 16ths or 32nds, count the number of increments between the zero-inch line and the one-inch line.\nTo measure the length of an object, line up the edge of an object with the zero-inch line. Count the number of integer lines between the zero-inch line and the end of the object. If the end of the object lies between two inch lines, count the number of small increments, starting at the lower of..

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What are some examples of ores?

Other examples of ores include gold, magnesium, silver, tin, scandium and beryl.Metals from ores can be used in manufacturing products, such as iron being extracted to make steel. Some metals are expensive to mine, such as titanium and aluminum. In these cases, the metals are used in smaller quantities to create alloy mixtures. The method of mining ores depends on the reactivity. For example, reactive metals are mined using electrolysis while non reactive metals are extracted by reduction.

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Where are the respiratory organs located in the human body?

The three major parts of the respiratory system are the airway, the lungs and the muscles of respiration. The airway sits at the top of the respiratory system and starts with the trachea, which reaches up to the base of the neck. The lungs are below the airway and the main muscle of respiration, the diaphragm, sits at the bottom of the respiratory system at the point on the body where the chest and abdomen meet.

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What are types of exocrine glands?

Exocrine glands primarily work by secreting products (with the exception of hormones and other chemical messengers) from ducts and duct glands that lead directly onto surfaces such as skin. These glands are the counterparts to endocrine glands, which work by secreting products or hormones directly into the bloodstream through ductless glands. Alternatively, they release special hormones called paracrines into nearby target cells, which only enter the adjacent release site. Endocrine glands include adrenal glands, which are situated on top of the kidneys and secrete the hormone adrenaline along..

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How do volcanoes change the Earth's surface?

As lava flows across the ground in the wake of a volcanic eruption, any existing plant life is at risk of immediate destruction. When lava mixes in with melting snow or rain water, the flow speeds up, and the environmental effects accelerate as well, because the destructive effects of the lava largely remain, but the spread is generally wider and takes place more quickly.\nAn example of this took place in Montserrat when Chances Peak entered a phase of eruption between 1995 and 2000. In 1995, the mountain began giving off signs of coming activity through eruptions of ash and dust. The most int..

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What causes eye twitching?

Doctors divide twitching eyes into three categories: minor eyelid twitching, benign essential blepharospasm and hemifacial spasms. Minor eyelid twitching, according to WebMD, is usually transient and almost always harmless. Its causes are not always obvious. Benign essential blepharospasm often involves both eyes and often begins with excessive blinking. As with minor eyelid twitch, benign essential blepharospasm is associated with stress and fatigue though it can also be triggered by exposure to wind and airborne particles.\nHemifacial spasms are more serious, notes WebMD, and they can be the..

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