Dalton’s atomic theory states that elements combine in simple numerical ratios to form compounds. A compound‚ no matter how it is formed‚ always contains the same elements in the same proportion by weight. The law of mass conservation states that mass can neither be created nor destroyed. In this experiment‚ the mass of the metal was not destroyed or created; the metal’s mass was simply changed into a compound form once the gas reacted to it. The net mass of the reactant side of the equation and
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EXPERIMENT 6 – Empirical Formula of a Compound INTRODUCTION Chemical formulas indicate the composition of compounds. A formula that gives only the simplest ratio of the relative number of atoms in a compound is the empirical formula or simplest formula. The ratio usually consists of small whole numbers. We call a formula that gives the actual numbers of each type of atom in a compound the molecular formula. The numbers in a molecular formula will be whole number multiples of the numbers in an empirical
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Technology School of Chemical Engineering and Chemistry Muralla St.‚ Intramuros‚ Manila Melting Point and Boiling Point of Organic Compounds Group No. 5 Manacup‚ Cris Vincent L. Oblena‚ Adrian D. Ong‚ Joshua Jyro B.* *Leader ABSTRACT In compounds‚ two of the physical properties affected by the varying structures are melting point and boiling point. Through the use of the Thomas-Hoover Melting Point Apparatus or the micro method‚ the melting and boiling point of organic compounds are now determined
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A scientist separated a mixture to obtain the specific substance that was in need. Many of the compounds and mixtures today are not found in its pure form‚ but in mixtures. Many scientists have the impression that separating mixtures is an important part of chemistry and modern academics. How can the components of mixture be separated and analyzed? Background Information: All elements and compounds are pure substances and they are categorized by having specific properties that are unique from other
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wavelength than red light Flame tests are used to identify the presence of a relatively small number of metal ions in a compound. Not all metal ions give flame colours. For Group 1 compounds‚ flame tests are usually by far the easiest way of identifying which metal you have got. Flame colours are produced from the movement of the electrons in the metal ions present in the compounds. For example‚ a sodium ion in an unexcited state has the structure 1s22s22p6. When you heat it‚ the electrons gain
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The conversion of liquid water into gaseous water is a chemical change. 19. All the following are examples of chemical changes except e) aging. 20. Which of the following is an example of a chemical change? e) a sunburn 21. Which of the following is(are) a chemical transformation? 1. frying an egg 2. boiling an egg 3. poaching an egg e) 1‚ 2‚ and 3 22. Which of the following is an example of a chemical change? d) silver tarnishing 23. The boiling
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Classifying Chemical Reactions Introduction Pre-lab questions 1. Which reactants used in this experiment are flammable? Discuss the safety precautions that are necessary when working with flammable materials in the lab? 2. Summarize the following description of a chemical reaction in the form of a balanced chemical equation? 3. Common observations of a chemical reaction are described in the introduction section. For each observation‚ name a common or everyday occurrence that must involve a chemical reaction
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Observations of Chemical and Physical Changes Derrick Davis Lab partner: None Location: My house Date Performed 25 Feb 15; 1600 CHE111-CO2 Photo 1 (Photo of me properly wearing safety goggles holding the student information card) Abstract: In chemistry it is important to understand the difference between physical and chemical changes. The objective of this experiment was to perform tests using heat or chemical mediators and observe the results for any physical or chemical changes. Various
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Synthesis and IR Analysis of trans-[Bis(inosinato)palladium(II)] Abstract In this lab we synthesized trans-[Bis(inosinato) palladium(II)] for IR analysis. After completion of the reaction 84.4% of the product was collected. IR spectrum of the product and inosine was analyzed to determine how the inosine is bonded to the metal‚ palladium. From the IR analysis‚ it was determined that when inosine reacts with palladium‚ a shift of about 65 cm-1 in the carbonyl stretch was observed. Introduction:
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position. I am specifically referring to my high sense of discipline‚ hardworking‚ academically good‚ physically and friendly. These are not all‚ my astuteness‚ Honest and ability to turn adversity into advantage are just proverbial. Beloved student‚ a compound prefect should be descent and well discipline‚ dedicated and wiliness to serve his people with all diligence. These are qualities that I am not deficient in. I know by now most of you are wondering how I will be able to realize them‚ I am specifically
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