Higher Chemistry Mole Calculations Moles and Number 1 mole of any substance contains the same number of atoms/molecules/ions as there are atoms in a 12g sample of carbon -12 12g of carbon-12 contains a constant number of atoms. This number is known as the Avogadro constant (L) and is equal to 6.02 x 1023. 1 mole of carbon-12 contains 6.02 x 1023 atoms. Therefore‚ 1 mole of any substance contains 6.02 x 1023 atoms/molecules/ions. For example‚ 1 mole of aluminium contains
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bicarbonate‚ silver nitrate‚ Barfoed’s test‚ Borax Test‚ Bial test‚ Osazones‚ Seliwanoff’s test‚ Molisch test‚ Beilstein test‚ hydroxamic test‚ sodium hydroxide hydrolysis‚ complex copper formation‚ ninhydrin test‚ nitrous acid‚ alkaline hydrolysis and‚ Zinc and ammonium chloride hydrolysis were used for the test for presence of functional groups. II. Introduction Preliminary tests previously learned are not enough to identify organic compounds. Functional groups present in organic compounds
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molecular weight of a gas is __________ g/mol if 3.5 g of the gas occupies 2.1 L at STP. A) 41 B) 5.5 × C) 37 D) 4.6 × E) 2.7 × 10) The volume of hydrogen gas at 38.0 °C and 763 torr that can be produced by the reaction of 4.33 g of zinc with excess sulfuric acid is __________ L. A) 1.69 B) 2.71 × C) 3.69 × D) 2.84 E) 0.592 11) The Mond process produces pure nickel metal via the thermal decomposition of nickel tetracarbonyl:
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CaCO3 shows that calcium carbonate was made from ....... different elements. iii The equation is balanced because there are ....... atoms on both sides.(1) (3) b Other metal carbonates decompose in a similar way. i Name the solid produced when zinc carbonate decomposes. (1) ii Name the gas produced when copper carbonate decomposes. (1) 4 Farmers can use calcium hydroxide to neutralise soils that are too acidic. Limestone is mainly calcium carbonate‚ CaCO3. Limestone is used
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ACKNOWLEDGEMENT First of all‚ we would like to say thanks to God‚ for giving me the strength and health to do this project work until it done. Not forgotten to our family for providing everything‚ such as money‚ to buy anything that are related to this project work and their advise‚ which is the most needed for this project‚ Internet‚ books‚ computers and all that as our source to complete this project. They also supported us and encouraged us to complete this task so that we will not procrastinate
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N12/4/CHEMI/SPM/ENG/TZ0/XX 88126104 CHEMISTRY standard level Paper 1 Friday 9 November 2012 (afternoon) 45 minutes INSTRUCTIONS TO CANDIDATES • Do not open this examination paper until instructed to do so. • Answer all the questions. • For each question‚ choose the answer you consider to be the best and indicate your choice on the answer sheet provided. • The periodic table is provided for reference on page 2 of this examination paper. • The maximum mark for this examination
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begin the flame confirmation tests‚ 20 drops of each cation were added to its labeled centrifuge tube. A Bunsen burner was then connected to the gas jet and lit to where a sharp blue cone was visible in the flame. A Nichrome loop was then soaked in HCl and placed in the flame until there was no color change in the flame. This insured there was no further solution on the loop.
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ABUL KHAIR STEEL PRODUCTS LTD: Company Case Study ABUL KHAIR STEEL PRODUCTS LIMITED COMPANY DESCRIPTION Abul Khair Steel Products Ltd (AKSP) is a newly established large metal finishing plant in Bangladesh‚ that produces a range of steel products‚ such as cold rolled (CR) coils‚ galvanized steel (GS) sheets and corrugated galvanized iron (CGI) sheets. AKSP was established in 1999 as a private limited company
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Designation: C 114 – 07 Standard Test Methods for Chemical Analysis of Hydraulic Cement1 This standard is issued under the fixed designation C 114; the number immediately following the designation indicates the year of original adoption or‚ in the case of revision‚ the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval. 1. Scope* 1.1 These test methods cover
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Designation: D2972 – 08 Standard Test Methods for Arsenic in Water1 This standard is issued under the fixed designation D2972; the number immediately following the designation indicates the year of original adoption or‚ in the case of revision‚ the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval. 1. Scope 1.1 These test methods2 cover the photometric and atomic
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