CHEMISTRY 221 LABORATORY�QUANTITATIVE ANALYSIS EXPERIMENT: DETERMINATION OF ASCORBIC ACID IN VITAMIN C TABLETS THEORY: Ascorbic acid‚ C6H8O6‚ MM = 176.13‚ can be oxidized to form dehydroascorbic acid by bromine via the following reaction: The bromine or iodine used in the titration is generated by adding an excess amount of KBr or KI to an acidified solution of the sample according to the following reaction: BrO3- + 5 Br- + 6 H+ 3 Br2 + 3 H2O IO3- + 5 I- + 6 H+
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MELAKA PEPERIKSAAN PERCUBAAN PMR TINGKATAN TIGA TAHUN 2013 BAHASA INGGERIS Kertas 2 Satu jam tiga puluh minit JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU 1. Kertas soalan ini mengandungi tiga bahagian : Bahagian A‚ Bahagian B dan Bahagian C. 2. Jawab semua bahagian. 3. Semua soalan hendaklah dijawab di dalam kertas jawapan anda. Kertas soalan ini mengandungi 5 halaman bercetak . 12/2 [Lihat sebelah] 2 SECTION A [25 marks] 12/2 Your friend is having some problems in his/her
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Question 1 Which one of the following operators computes the remainder of an integer division? Answer / % \ ! .2 points Question 2 Which one of the following is defined as a sequence of characters? Answer String Constant Integer Variable .2 points Question 3 Which one of the following variables is assigned with valid literals? Answer int salary = 0; salary = 5000.50; unsigned short salary1 = 0; salary1 = 1E6; double salary2
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BASIC INPUT/OUTPUT The C++ standard libraries provide an extensive set of input/output capabilities which we will see in subsequent chapters. This chapter will discuss very basic and most common I/O operations required for C++ programming. C++ I/O occurs in streams‚ which are sequences of bytes. If bytes flows from a device like a keyboard‚ a disk drive‚ or a network connection etc. to main memory‚ this is called input operation and if bytes flows from main memory to a device like a display screen
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In the novel Parvana by Deborah Ellis there were many characters who were affected by the war in Afghanistan and one of them is Parvana. Parvana had many experiences some of them were cruelty of war‚ cruelty of the Taliban‚ the discrimination against women and friendship. Firstly‚ parvana experiences cruelty of war in Afghanistan. “ Bombs had been a part in Parvana’s whole life”. This shows how her mind be tuned to only seeing destruction such as war‚ bombs‚ injuries‚ loss of houses‚ poverty
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The C-130 The C-130 Hercules was born from a request by the United States Air Force for a replacement transport aircraft for the C-119 Flying Boxcar‚ C-47 Skytrain‚ and C-46 Commando‚ which were inadequate for modern warfare after the Korean War. The USAF wanted a plane that could have a capacity of 92 passengers‚ 72 combat troops or 64 paratroopers fly a range of around 1‚100 nautical miles‚ have the ability to fly with one engine shut down‚ and be able to take-off from unprepared runways (MotoArt
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possible try experimenting with concepts revealed by each question. 3. There are 20 objective type questions on ANSI C. PART - A With every use of a memory allocation function‚ what function should be used to release allocated memory which is no longer needed? a.) b.) c.) d.) unalloc() dealloc() release() free() What will print when the sample code above is executed? a.) b.) c.) d.) y= y= Compiler Error y= The definition of a above explicitly initializes its first four elements. Which one
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cplusplus.com C++ Language Tutorial Written by: Juan Soulié Last revision: June‚ 2007 Available online at: http://www.cplusplus.com/doc/tutorial/ The online version is constantly revised and may contain corrections and changes The C++ Language Tuttoriiall 2 © cplusplus.com 2008. All rights reserved This document and its content is copyright of cplusplus.com © cplusplus.com‚ 2008. All rights reserved. Any redistribution or reproduction of part or all of the content in any form is prohibited
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computing systems. a. Reduced-function IT b. Last gen software c. Legacy systems d. Bloat-ware 2. Enterprise systems are integrated ISs that support core business processes and functions. How is integration achieved? a. Integration is achieved by connecting wired and wireless computer networks so they can share applications. b. Integration is achieved by outsourcing to vendors that replace stand-alone ISs with a single IS. c. Integration is achieved by linking databases and data warehouses
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Estimating the Vitamin C Concentration in Fruit Juices: A Redox Titration Prelab Assignment – Please turn your answers in on GaView prior to lab 1. How will you prepare a .02% (m/v) NBS solution? Calculations should be in your notebook before arriving to lab. 2. Provide the structure of vitamin C in its reduced form (ascorbic acid)‚ its ionized form (ascorbate ion- this is at equilibrium with reduced form when dissolved)‚ and its oxidized form (dehydroascorbate). 3. Why do you
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