Chem-102 Lab Dr. Sobhi Experiment #3: Spectrophotometric Determination of Tartrazine Purpose The objectives of this lab include- illustrating the use of the spectrophotometer in chemical analysis‚ and generating a standard‚ or calibration curve‚ then using that curve to determine the value of an unknown substance. The spectrophotometer is one of the most powerful tools used in chemistry to find the concentration of substances in solution. It compares the colors of a known and an unknown solution
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Colonies 13 Original Colonies. Connecticut‚ Delaware‚ Georgia‚ Maryland‚ Massachusetts Bay Colony‚ New Hampshire‚ New Jersey‚ New York‚ North Carolina‚ Pennsylvania‚ Rhode Island‚ South Carolina‚ and Virginia. Out of these 13‚ Virginia‚ Rhode Island‚ and Pennsylvania stood out to me the most. Even though these three colonies have differences based on how they started‚ who governed them‚ and how they were governed‚ they still have many similarities. 1607. Jamestown‚ Virginia. Founded by John Smith
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with the use of diodes. The limiting level of a clipper circuit is the barrier potential of the diode in use. A diode clipper that trims down the positive half cycle input of a wave signal is as positive limiter. The output signal will retain the original output of a negative half cycle while the output signal of the positive half cycle is trimmed up to the barrier potential of the diode. While a negative limiter is similar to the positive limiter but instead it limits the negative half cycle to the
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Essay on the “Little Albert Experiment” Clarence Losey South University Online Essay on the “Little Albert Experiment” Classical Conditioning is a form of behavioral learning in which a previously neutral stimulus acquires the power to elicit the same innate reflex produced by another Stimulus (Jonson‚ Zimbardo & McCann‚ 2009‚ p.95). By pairing the banging bar and the white rat‚ Watson and Rayner were able to use classical conditioning by hitting the bar at the same time Albert touched
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Trial # Guess Observation Explanation Trial 1 The dyed red water will not seep into the blue cold water. My guess was indeed correct and red water did not interfere with the blue water. Because the molecules in the blue water are much closer together because its cold and well the red water has warm/hot water and the molecules are everywhere. The molecules in the blue water are so dense that they’re making a layer so that the molecules from the red jar do not come through. Trial 2 I think
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(1) Answer to Question in lab manual. NO introduction/background etc. 1. What is the retention time for caffeine? Retention time for caffeine : 4.149+4.142+4.152+4.1454 = 4.15 2. What is the retention time for benzoic acid? Retention time for caffeine : 2.651+2.817+2.857+2.9274 = 2.81 3. How are the retention times for caffeine and benzoic acid related to their chemical structure and the nature of the chromatographic
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What was the original purpose of NATO? In which ways has NATO "reinvented" itself in the post-cold war world? Suggestions: Concise coverage of NATO + CW Belief of many politicians that NATO had become redundant re: end of CW How NATO has defied this prediction Eg expansion of NATO -> PFP -> NATO+Russia Kosovo 9/11 Afghanistan At present two important formal alliances dominate the international security scene. By far the most powerful is the North Atlantic Treaty Organisation (NATO)
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------------------------------------------------- ------------------------------------------------- 1. What is the dependent variable for this experiment? ------------------------------------------------- The dependent variable is the concentration (solute) of the potato. ------------------------------------------------- ------------------------------------------------- 2. What is the independent variable for this experiment? ------------------------------------------------- The independent variable is the concentration (solute)
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saw the cruel ruling of Puritanism through his puritan view and showed his dissatisfaction towards it. To analyze through symbolism in his famous work of "The Scarlet Letter"‚ we can see the important theme of Original sin and the redemption of humanity. Key words: Puritanism‚ original sin‚ redemption 1. Nathaniel Hawthorne’s life: 1.1 Nathaniel Hawthorne’s background: Nathaniel Hawthorne‚ the great romanticist of American literature in 19th century‚ was born on the 4th of July 1804‚ in Salem
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Abstract Ernest Rutherford’s Gold Foil Experiment was a major stepping stone one the way to discovering what the atom was really made up of. From the beginning of his research with alpha particles to his discovery of the atomic nucleus‚ Rutherford made many contributions to the microscopic world of the atom. The Rutherford Experiment‚ otherwise known as the Gold Foil Experiment‚ was the crown of his achievements‚ and it was during this experiment that he discovered the atomic nucleus. (Aydin &Hanuscin
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