suspect that this unknown compound is either acetanilide or phenacetin. From the solubility of acetaminophen and phenacetin‚ we could know both of them are relatively soluble in boiling water but insoluble in cold water so that we took the recrystallization as the method to purifying the unknown component. After the unknown purified‚ then we could measure it melting point. This whole experiment is based on purifying and then finding the melting point of the unknown compound. The theory is that if a
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Hydrogen is recognized as the simplest and lightest chemical element in the periodic table; even though it is identified as one of the top elements in abundance in the world (consisting of 0.9 percent of the total mass on earth)‚ it is considered to be the most abundant element in the entire universe. It is a gaseous element with the atomic symbol being H. It is usually categorized under the first group of the periodic table known as the alkali metals. It contains only one electron that revolves
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that natural food have‚ certain chemical compound have discovered and developed certain ways to preserve food and extend their life for longer. Furthermore‚ there are many different types of chemical compounds were added to our daily diet‚ yet certain chemical compounds can be listed on the nutrition label‚ and even they cannot be tested or seen on the products. Butylated hydroxyanisole and Butylated hydroxytoluene and Ethanol are among of that chemical compounds‚ which were used in certain food and
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using the equations‚ simple and compound interest. These are example I have achieved this school quarter. Discuss one or two topics or concepts that have been a struggle so far. The concepts that I have a struggle with this term start with rounding and estimating like for example‚ I would have something like maybe 47 but I know how you round to the closer which will be 50 and if the whole number is 1. The second concept I been struggle with has been simple and compound interest has been the worse.
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the amount of Protons and Neutrons in the Nucleus. Atomic Number The amount of protons found in the nucleus. Element A pure substance made up of 1 type of atom. Molecule Two or more atoms joined (bonded) together‚ forming a small particle. Compound A substance made up of two or more different types of atoms that have been joined (bonded) together. Lattice A lattice is a part of bonding between metals. Word Equation A word equation is an equation where only the words of the products and
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source to search information about this new material. Thermochromism is the reversible change in the color of a compound when it is heated or cooled. Systematically investigated thermochromism was in 1971 at first time. The following 4 materials are used as thermochromism (1) Organic Compound (2) Inorganic Compound (3) Polymer (4) Sol-Gel 1. Organic compound thermochromism Organic compound thermochromism occurred due to equilibrium between two molecular species‚ acid-base‚ keto-enol‚ lactim-lactam
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This is due to the fact that having mixed compounds will cause the melting point to grow in range and decrease in starting temperature2. If a compound is mixed‚ it means the crystalline structure will not be able to bind with itself as efficiently‚ as there will be different molecules in the way. This leads to weaker interactions‚ and therefore
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belo is made to allow studens to btain pure compounds that can be characterized by NMR and other analytical techniques‚ but color test is well enough for synthesizing the dyes and purification process is omitted. Safety considerations. Due diligence should be exercised in this reaction. The scale of the work is such as to minimize chemical wastes‚ but products should be discarded as organic waste. Diazonium ions should be used immediately. Stored compounds can decompose‚ sometimes violently. DO synthesis
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CH201L S.Y. 2014-2015 Analysis of Oxygen-Bearing Organic Compound 2 BS Chemistry‚ College of Science‚ University of Santo Tomas Espana‚ Manila Philippines 1015 Abstract An unknown sample was given along with five standards to test the presence of oxygen in the sample. The unknown sample underwent five different chemical analysis namely Dichromate test‚ Tollen’s test‚ Lucas test‚ DNPH test‚ and Iodoform test. Each test will determine if the unknown sample will have the same reaction as
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interest rate is 12% compounded quarterly‚ what is the compound interest at the end of 5 years? Find the compound amount if P17‚500 is invested at 9.2% compounded semi-annually for 3.5 years. Determine the present value of P150‚000 due in 6 years if the interest rate is 5.5% compounded annually. If P135‚650 is the maturity value of a sum invested at 13.2% compounded semi-annually or 9 years and 6 months‚ find the present value and the compound interest earned. For P97‚500 to grow to P216‚000 in
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