Freezing Point Depression Purpose: The purpose of this lab is to demonstrate freezing point depression by dissolving salt into two liquids and monitoring temperature. Materials: test tube‚ Thermometer‚ 10 mL graduated cylinder‚ 2 micropipettes‚ Styrofoam cups‚ 4 pieces plastic wrap‚ 70% ethyl rubbing alcohol‚ 91% isopropyl rubbing alcohol‚ ice‚ distilled water‚ rock salt Procedure: Using the graduated cylinder‚ measure 2 mL of alcohol and pour it into the test tube. Add 10 mL of
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In the process of boundaries being created the markers for these are called lines and corner points. Lines are invisible or distinctive such as a tree line creek or even a fence that was put up that would connect two corner points or terminal points. A corner point can also be along the line of there is a third party involved with that line. The corner points do not have to be on the line in its self but must have a distinctive description on exactly how it will be found. These corners are usually
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be affordable‚ an addition to my Fish tank‚ and Get along with all six Angelfish. Live in water temperatures of 78-82 degrees Fahrenheit‚ and not make a mess in the tank or destroy the vegetation already living in the aquarium. I have set up a point by point arrangement to help me select the best algae eater for my tank. The Chinese algae eater Price Size Life Span Characteristic Tank Mates Temp. Range Waste $2 - $8 11in. - 1ft 3– 5years Docile as a juvenile /territorial as it mature
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10‚ 2014 Lab # 4: Melting Point lab Partner: Instructor: The Testing of the Melting Points of p-dichlorobenzene and naphthalene Introduction: Melting point temperature is a physical property of pure substances. It is an intensive property‚ which means the amount of material tested is irrelevant. This lab will determine the melting point temperatures of two known pure substances‚ naphthalene and p-dichlorobenzene‚ using micro-sized quantities and a capillary melting tube apparatus. The
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Exploring Boiling Points Introduction: Every substance has a unique set of properties that allow us to differentiate between them. These properties are classified as physical properties and chemical properties. Physical properties are those that can be determined or measured without changing the composition or identity of the substance. These properties include color‚ odor‚ taste‚ density‚ melting point‚ boiling point‚ conductivity‚ and hardness. Chemical properties tell us how the substance
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Based on the molar mass of calculated‚ the identity of the unknown substance D is Glycine. 2) Finding the concentration of a known solution Table 1.2: Table used for the preparation of the calibration curve used to find the concentration of alcohol in a wine. 0.2mL of each sample were taken and placed in the Osometer. Ethanol sample (g EtOH/100mL) | Osmolality (mOsm/kg H2O) | 5.117 | 109 | 7.984 | 181 | 11.13 | 242 | 14.01 | 307 | 18.31 | 404 | Wine tested: Piesporter (White)
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lThe 10 points which i’ve picked up from various kind of informative books i borrowed are: A wind turbine is a product that converts wind energy into electrical energy that is use to distribute to the homes of people. Benefits of a wind turbine: It does not release any harmful gases into the air when powered and it is also affordable in many different countries for supplying electricity to homes‚ by converting the wind energy to electricity for distribution. A hydropower is a production of
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addition to all the features of the C language. The first C with Classes compiler was called Cfront‚ which was derived from a C compiler called CPre. It was a program designed to translate C with Classes code to ordinary C. A rather interesting point worth noting is that Cfront was written mostly in C with Classes‚ making it a self-hosting compiler (a compiler that can compile itself). Cfront would later be abandoned in 1993 after it became difficult to integrate new features into it‚ namely C++
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potassium and chloride is an ionic bond. The potassium becomes a cation and the chloride an anion. The potassium end of the molecule becomes slightly positive and the other end slightly negative. Na – sodium contains metallic bonding. It has a high melting due to the bonding and has strong bonds. Each sodium atom is being touched by eight other sodium atoms and they all share electrons between the nuclei and shells. The electrons can move freely within the sodium metal and therefore can conduct electricity
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A force can do one of four things to an object: 1. Make it speed up - accelerate. 2. Make it slow down - decelerate. 3. Change its direction. 4. Change its shape. If something is doing one of these four things there must be net force acting upon it. Newton’s First Law ’Every body continues in a state of rest or uniform motion unless acted upon by an external force.’ Something without net force acting on it will either stay still or move at a constant speed in a straight line until
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