molecules‚ energy‚ rate‚ temperature) Name some compounds: H2O (Hydrogen and Oxygen elements - Water) CH4 (Carbon and Hydrogen elements - Methane) NaCl (Sodium Chloride- salt) Different types of compounds: Metal + Metal = Metallic Compound Metal + Non-Metal = Ionic compound Non-Metal + Non-Metal = Covalent compound Different types of reactions: Metal+ non-metal ionic compound Non-metal + non-metal covalent compound Metal + metal metallic compound Respiration‚ oxidation‚ photosynthesis and precipitation:
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How many grams of sulfur would combine with 26.1 g of potassium to form K2S? 2. A 1.31g sample of sulfur was reacted with chlorine to form 4.22g of compound. What is the empirical formula of the compound? 3. 0.256g of a lanthanum oxide was decomposed and produced 0.219g of lanthanum. What is the empirical formula of the compound? 4. What is the purpose of heating the empty evaporating dish and watch glass? 5. What is the purpose of the watch glass? Why is it not necessary
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tap water contains ions and minerals that conduct electricity due to the charges within the water. Distilled water is a liquid covalent compound where there are no charges or minerals and ions floating around and thus no electricity is conducted. The conductivity of either
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3090 3090▌ SHORT REVIEW Reaction of Diazo Compounds with Organoboron Compounds short review Huan Li‚ Yan Zhang‚ Jianbo Wang* Reaction of Diazo Compounds with Organoboron Compounds Abstract: The transition-metal-free reactions of diazo compounds with organoboron compounds are reviewed. This type of reaction provides an alternative approach for the formation of C–C‚ C–B‚ and C–Si bonds. Moreover‚ by using tosylhydrazones as diazo compound precursors and boronic acids/esters as the boron
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To: Aron Huckaba From: Peyton Lewis Date: 9/20/12 Subject: Experiment 3: “Identifying a Constituent of Panacetin” Partner: Julie Covington Introduction This experiment was a continuation of Experiment two‚ with a slightly different question to be answered. In this experiment‚ we are trying to find the identitiy of the unknown component of Panacetin. This is answering question 2 of the two questions that were to be answered in experiment 2. The equation of this reaction is as follows (and
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When elements combine to produce a compound‚ each element is assigned an “apparent” charge. This apparent charge‚ the charge an atom would have if both electrons in each bond were assigned to the more electronegative element‚ may be positive or negative. It is called the oxidation number or state of the element in the compound. Oxidation numbers are very useful in keeping track of what happens to electrons when various elements combine to form compounds. By remembering a few generalizations
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substances: an element and a compound. Element: A substance that cannot be broken down by chemical means. An element is a pure substance because it is made up of one type of atom it also cannot be broken down further into another substance. (This deems it pure) Compound: A substance that is made up of 2 or more elements‚ it is still considered a pure substance because while the elements bond so do the atoms. Therefore there is only one type of atom in the compound. Impure substance- Mixture:
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sentences as simple‚ compound‚ complex or compound-complex. Instructions: Classify the following sentences as: Simple‚ Compound‚ Complex‚ and Compound-Complex. Just submit your answers on the submission box. Each sentence is worth 2 points. Good Luck! 1. Ottawa is the capital of Canada‚ but Toronto is the capital of Ontario. Compound 2. Democracy is a noble goal; it is important‚ however‚ to protect the minority from the tyranny of the majority. Compound 3. I do not own a
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against KB cells. The decatenation assay revealed that compounds 82 and 83 inhibit hTopoIIa activity at 20 µM‚ while three other compounds 81‚ 82‚ and 84‚ exhibited hTopoIIα inhibitory activity at concentration of 50 µM [53]. Novel oxo-heterocyclic fused naphthalimide derivatives were prepared and showed potent antiproliferative activity along with their thio-heterocyclic fused analogs by Tan et al.‚ 2013. Further studies showed that compounds 85‚ 86 and 87‚ 88 showed strong inhibition activity both
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calculate total magnification on a compound light microscope? How is the calculation of magnification different on the pocket microscope? The total magnification in a light microscope is the product of the ocular and objective lenses. Suppose Ocular is of 10x Objective lens is of 40 x. Total magnification will be 10X40=400. For pocket Microscope M= (LENGHT OF MICROSCOPE TUBE)/(focal length OF EYE PIECE)*(focal length of objective lens) 2. What parts of a compound light microscope can be used to control
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