the atomic masses of all the atoms present in one molecule of that compound. Example: the molecular mass of sodium bromide‚ NaBr‚ is 103‚ which represents the sum of the atomic mass of sodium (23) plus that of bromide (80). * Calculating the Molecular Mass (Formula Mass) of a Compound * To find the molecular mass of a compound‚ add the atomic masses of all the atoms that are present in that compound. * In the compound H2O‚ the molecular mass can be calculated by adding the mass of two
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extraction. Extraction is a systematic process of separating mixtures of compounds‚ taking advantage of the affinity differences of compounds to separate them (Padias 128-37). This technique recognizes the principle that “like dissolves in like‚” that is‚ polar solutes dissolve in polar solvents and non-polar solutes dissolve in non-polar solvents. Through extension of this principle‚ one can use extraction to separate compounds of a mixture. There are three different methods of extraction; solid-liquid
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Thin Layer Chromatography (TLC) is a solid-liquid technique in which the two different phases are a solid stationary phase and a liquid mobile phase. TLC can be used to detect a given compound in a mixture‚ follow the course of the reaction‚ follow the purification of a compound‚ or evaluate the purity of the compound. Objectives: Certain objectives needed to be met in order for the Thin Layer Chromatography (TLC) experiment to be understood and completed. The identification of an unknown‚ and
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MATHEMATICS OF INVESTMENT Simple Interest If you borrow a car from a car rental company or if you live in someone else’s house or apartment‚ you have to pay rent. Like paying rent for the use of a car or a house‚ you also have to pay rent for the money you borrowed. This is called interest. People like Marco earn by charging interest on loans. Banks earn most of their income from the interest that people pay for the amounts they borrow. How much interest one has to pay depends on three factors:
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CARBON AND ITS COMPOUNDS Covalent Bond: A chemical bond formed by the sharing of two atoms. Types of Covalent Bonds i. Single Covalent Bond: A type of bond formed by sharing of one pair of electrons between two atoms. ii. Double Covalent Bond: A type of bond formed by sharing of two pairs of electrons between two atoms. iii. Triple Covalent Bond: A type of bond formed by sharing of three pairs of electrons between two atoms. Properties of Covalent Bond i. Their B.P. and M.P
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Hexanal Methyl Hexanode Hexanal Chloride Hex-3-en-2-one Spartan Vibrational frequencies: Compound Frequencies (in ) 2-Hexanone 1934 Hexanoic Anhydride 1946 Hexonic Acid 1964 Hexanoamide 1895 Hexanal 1918 Methyl Hexanode 1940 Hexanal Chloride 1968 Hex-3-en-2-one 1916 Frequencies from the IR spectrophotometer: Compound Frequencies (in ) 2-Hexanone 1716.2 Hexanoic Anhydride 1816.7 Hexonic Acid 1708.7 Hexanoamide 1628.3 Hexanal 1725
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SYNTHESIS OF 1-PHENYLAZO-2-NAPHTHOL ABSTRACT Amines are compounds composed of nitrogen atoms bearing alkyl or aromatic compounds. Amines undergo interesting reactions‚ one of which is with the reaction with nitrous acid producing an azo dye. In this study‚ the experiment focused on synthesizing an observing the physical properties of Sudan-1. Sudan-1 is of the most common dyes found in waxes‚ oils and in some food ingredients specifically curry and chilli powder. Furthermore‚ this study aimed to
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insertion reactions involve the insertion of a carbene‚ a neutral carbon atom or molecule with two unpaired valence electrons‚ into an unactivated carbon-hydrogen bond. This reaction produces many commercially valuable compounds. The reaction itself involves the use of diazocarbonyl compounds which contain an N2 ligand on a carbon alpha to a carbonyl. The reaction is thermodynamically favourable as it involves the release of nitrogen gas. The carbon hydrogen bond is extremely strong and is difficult to
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into their original components. Mixtures of two miscible liquids with two different boiling points were separated. Therefore‚ it can be said that the two organic compounds are separated by exploiting the different boiling temperatures of the liquids. Both vaporization and condensation were used in this experiment. The two organic compounds used in this experiment were ethyl benzene and cyclohexane‚ which have the boiling point of 136°C and 80.74°C‚ respectively. This experiment resulted
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development of new lead compounds. In this paper‚ pharmacophore of 10 novel anti-lung cancer compounds has been identified and validated for the first time. Using LigandScout the pharmacophore features were predicted and 3D pharmacophore have been extracted via VMD software. A training set data was collected from literature and the proposed model was applied to the training set whereby validating and verifying their similar activity as that of the most active compounds. Therefore they could be
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